™
SLT3 3CH
NOTICE
All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC. For
up-to-date product literature, visit horizonhobby.com or towerhobbies.com and click on the support or resources tab for this product.
Meaning of Special Language
The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:
WARNING: Procedures, which if not properly followed, create the probability of property damage, collateral damage, and
serious injury OR create a high probability of superficial injury.
CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility
of serious injury.
NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or no
possibility of injury.
WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating.
Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic
mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury or damage to the
product or other property. This product is not intended for use by children without direct adult supervision. Do not attempt
disassembly, use with Incompatible components or augment product in any way without the approval of Horizon Hobby, LLC.
This manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions
and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.
WARNING AGAINST COUNTERFEIT PRODUCTS: Always purchase from a Horizon Hobby, LLC authorized dealer to ensure
authentic high-quality Spektrum product. Horizon Hobby, LLC disclaims all support and warranty with regards, but not limited
to, compatibility and performance of counterfeit products or products claiming compatibility with DSM or Spektrum technology.
Age Recommendation: Not for Children under 14 years. This is not a toy.
NOTICE: This product is only intended for use with unmanned, hobby-grade, remote-controlled vehicles. Horizon Hobby
disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.
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WARRANTY REGISTRATION
Visit www.spektrumrc.com/registration today to register your product.
SAFETY PRECAUTIONS
• Always ensure all batteries have been properly charged
prior to using the model.
• Always check all servos and their connections prior to each run.
• Never operate your model near spectators, parking areas
or any other area that could result in injury to people or
damage of property.
• Never operate your model during adverse weather
conditions. Poor visibility can cause disorientation and
loss of control of your model.
• Never point the transmitter antenna directly toward the
• If at any time during the operation of your model you
WATER-RESISTANT COMPONENT
Your new SR315/SLR300 Receiver has a special water-resistant
coating on the electronics to ensure reliable performance in
higher than average moisture conditions. This conformal coating
can offer mild protection from light drops of water.
• DO NOT submerge this product under water for any period
of time. If it is submerged, it may result in damage or loss of
function.
• DO NOT pour water onto or allow excess water to come in
direct contact with the product.
• DO NOT operate this product in heavy rain or snow.
• DO NOT expose this product to salt water (ocean water or
In case of excess exposure to water or debris, immediately
wipe down the SR315/SLR300 with a soft cloth, and allow it
to fully dry before next use.
NOTICE: Never use a pressure washer to clean your vehicle.
NOTICE: Make sure the other components in your vehicle are
waterproof or water-resistant before driving in wet conditions.
model. The radiation pattern from the tip of the antenna is
inherently low.
observe any erratic or abnormal operation, immediately
stop operation of your model until the cause of the
problem has been ascertained and corrected.
water on salt-covered roads), contaminated or polluted water.
1SPEKTRUM SLT3 USER GUIDE
EN
SLT3 TRANSMITTER PACKAGES
SPMRSLT300: SLT3 Transmitter only
SPMSLT300: SLT3 Transmitter and SR315 Receiver
SPMSLT310: SLT3 Transmitter and SLT300 Receiver
SLT3 TRANSMITTER FUNCTIONS
Specifications
Power Supply: 4 AA Batteries
Operating Frequency: 2.4GHz
Transmit Power: <100mw
Control Protocol: SLT
Control: Proportional Steering and Throttle/Brake with Trim Knobs,
Third Channel with 3 Position Momentary Switch
Auxiliary Functions: 3 Position Throttle Limit Switch, Steering
Rate Knob to Change Steering Travel on-the-fly, Programmable Servo
Travel for Steering and Throttle/Brake
A. Throttle Trim
Adjusts the throttle neutral point
B. Steering Trim
Adjusts the steering center point. Normally, the steering trim is adjusted until
the vehicle tracks straight.
C. LED
• Solid red lights: Indicates the power is ON and adequate battery power
• Flashing red lights: Indicates the battery voltage is critically low.
Replace batteries
D. Steering Wheel
E. Throttle/Brake
F. Steering Rate
On-The-Fly knob for travel adjustment on the steering
G. Channel 3
3 position momentary switch, middle position is neutral
For programming press up for A button, press down for B button
H. Throttle Limit
Limits throttle output to 50/75/100%
Select 50% or 75% for less experienced drivers or when you are driving the
vehicle in a small area.
I. Throttle (TH) Servo Reversing
Move the switch to reverse the throttle channel
J. Steering (ST) Servo Reversing
Move the switch to reverse the steering channel
K. Power Button
INSTALLING THE TRANSMITTER BATTERIES
This transmitter requires 4 AA batteries.
1. Remove the battery cover from the
transmitter.
2. Install the batteries as shown.
3. Install the battery cover.
A.A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
CAUTION: If using rechargeable batteries, charge only rechargeable batteries. Charging non-rechargeable batteries
may cause the batteries to burst, resulting in injury to persons and/or damage to property.
CAUTION: Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to
national regulations.
2 SPEKTRUM SLT3 USER GUIDE
SERVO TRAVEL
The servo travel on the Steering and Throttle channels can be adjusted through a special programming mode in the transmitter.
1. Begin with the transmitter binding process to the receiver complete. Power ON the receiver.
2. Hold full right and full brake while powering the transmitter ON to put the transmitter into programming mode.
The LED on the transmitter will flash 4 times to indicate it is in programming mode.
3. Turn and hold the wheel full left to set the travel limit for that direction, Press the A button to increase travel, press the B
button to reduce travel. The LED will flash once with every change. Return the wheel to center to set the travel value.
IMPORTANT: If the value has reached the maximum or minimum that can be accepted, the LED will not flash with further input.
4. Turn the wheel to the right and repeat the process to set the steering travel to the right.
5. For electric vehicles, power the Transmitter OFF to save the settings. Calibrate your ESC to the default throttle travel.
6. For fuel powered vehicles, set the throttle travel without the engine running; After setting steering travel, you can set
throttle travel with the same process. Pull and hold full throttle, adjust travel with the A and B buttons, return to center to
set the value.
7. Push full brake, adjust travel with the A and B buttons, return to center
8. Power the transmitter OFF to save the values.
FACTORY RESET
There is a hidden mode if you want to reset the servo travel and calibration in the transmitter.
1. Hold full left and full brake while powering the transmitter ON to put the transmitter into programming mode.
The LED will flash 4 times then turns OFF to indicate factory reset.
2. Release the wheel and throttle trigger back to neutral and the LED will illuminate to indicate factory reset is complete.
3. Power the transmitter OFF.
SPMSLR300 3 CHANNEL RECEIVER
Specifications
Type: FHSS 2.4GHz
Dimensions (LxWxH): 33.4mm x 21mm x 12.6mm)
Antenna Length: 140mm
Channels: 3
Weight: 6 grams
Band: 2.4GHz
Voltage Range: 3.5–9.6V
Bind Type: Bind Plug
SLT
Protocol
Auxiliary Channel
Steering Channel
Throttle Channel
BIND/ Battery port
LED
SLR300 BINDING
1. Insert the bind plug into the bind port on receiver.
2. Power on the receiver, the LED will flash rapidly to indicate it is in bind mode.
3. Power on the transmitter; the LED light on the receiver will stop flashing an stay illuminated to indicate binding is
complete.
FAILSAFE
Always set the failsafe position for zero throttle.
1. Power on the TX and RX ,make sure the transmitter and receiver are connected properly.
2. Hold steering, throttle trigger and AUX controls at the desired failsafe positions.
3. Insert the bind plug into the bind port on the receiver; The LED on the receiver will flash 3 times and then remain lit to
indicate the failsafe positions have been set.
SLR300 LED INDICATOR
• When the receiver enters bind mode, the LED flashes rapidly.
• If the receiver looses signal, the LED light flashes slowly to indicate it is in failsafe mode.
• When the receiver is connected to the transmitter, the LED remains illuminated.
• When setting the fail-safe positions, the LED light flashes three times and then remains illuminated.
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3SPEKTRUM SLT3 USER GUIDE
EN
SPMSR315 DUAL PROTOCOL RECEIVER
Specifications
Type:
Dual
Dimensions (LxWxH):
Antenna Length:
Channels:
Weight:
Band:
Voltage Range:
Protocol 3 Ch Receiver* (SLT/DSMR)
32.5 x 21.5 x 12.4mm
229mm
3
6g
2.4GHz
3.5–9.6V
Bind Type: Bind Button
Failsafe:
positions during binding
*SPMSR315 receivers included with the SPMSLT300 package include SLT and DSMR
compatibility. If you have an SR315 receiver that was purchased by itself, you may
need to install a rmware update to make your SR315 SLT compatible.
Hold the steering wheel and throttle trigger in the desired failsafe
STR THR
AUX 1
SR315 BINDING
Binding is the process of programming the receiver to recognize the GUID (Globally Unique Identifier) code of a single
specific transmitter.
1. Power ON the receiver, press the bind button three times quickly
(within 1.5 seconds). The LED will begin to flash with a pause.
2. Set the trims and control positions at the desired failsafe settings,
and power ON the SLT3 transmitter.
3. When the LED on the SLT3 transmitter and receiver remain lit,
binding is complete.
You must rebind when:
• Different failsafe positions are desired e.g., when throttle or
steering reversing has been changed.
• Binding the receiver to a different transmitter.
Bind Button
BATT
RECEIVER ANTENNA
The receivers feature a coaxial antenna design for easy installation in almost any model. Think of the last 1 inch (32mm) on the tip
of the antenna as the active portion of the antenna, the coaxial portion leading up to it is just an extension. Install the antenna so
the active portion is positioned as high as possible in the vehicle, and not “in the shadow” of any carbon fiber or metal. The case of
the receiver can accept an antenna tube directly, making optimal antenna placement easy (antenna tube not included).
WARNING: Do not kink, cut or damage the antenna wire. The antenna is made of a coaxial wire; if the outer sheath
becomes damaged, the receiver will not work properly. If the antenna is damaged in any way, replace the antenna
before attempting to use the receiver.
INSTALLATION AND WIRING
1. Select a location to mount the receiver that is protected with good placement for the antenna. The antenna should be
located as high from the ground as possible and away from conductive surfaces.
2. Use double sided tape, hook and loop material, or foam insulation in your mounting box to secure the receiver.
4 SPEKTRUM SLT3 USER GUIDE
2.4GHz TROUBLESHOOTING GUIDE
Problem Possible Cause Solution
The system will not
connect
The receiver goes into
failsafe mode a short
distance away from the
transmitter
The receiver quits
responding during
operation
Your transmitter and receiver are too close together Move transmitter 1 to 3 meters from receiver
You are around metal objects Move to an area with less metal
Replace the receiver or contact Horizon Product
Check the receiver antenna to be sure it is not
cut or damaged
Inadequate battery voltage
Loose or damaged wires or connectors between
battery and receiver
Support
Make sure your receiver antenna is in an antenna
tube and is above the vehicle
Charge batteries. Spektrum receivers require at
least 3.5V to operate. An inadequate power supply
can allow voltage to momentarily drop below 3.5V
and cause the receiver to brown out and reconnect
Check the wires and connection between the battery
and receiver. Repair or replace wires and/or connectors
1 YEAR LIMITED WARRANTY
What this Warranty Covers
Horizon Hobby, LLC, (Horizon) warrants to the original
purchaser that the product purchased (the “Product”) will be
free from defects in materials and workmanship for a period
of 1 year from the date of purchase.
What is Not Covered
This warranty is not transferable and does not cover (i)
cosmetic damage, (ii) damage due to acts of God, accident,
misuse, abuse, negligence, commercial use, or due to
improper use, installation, operation or maintenance, (iii)
modication of or to any part of the Product, (iv) attempted
service by anyone other than a Horizon Hobby authorized
service center, (v) Product not purchased from an authorized
Horizon dealer, (vi) Product not compliant with applicable
technical regulations, or (vii) use that violates any applicable
laws, rules, or regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON
MAKES NO OTHER WARRANTY OR REPRESENTATION, AND
HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. THE
PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE
DETERMINED THAT THE PRODUCT WILL SUITABLY MEET
THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.
Purchaser’s Remedy
Horizon’s sole obligation and purchaser’s sole and exclusive
remedy shall be that Horizon will, at its option, either (i)
service, or (ii) replace, any Product determined by Horizon
to be defective. Horizon reserves the right to inspect any
and all Product(s) involved in a warranty claim. Service or
replacement decisions are at the sole discretion of Horizon.
Proof of purchase is required for all warranty claims. SERVICE
OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS
THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.
Limitation of Liability
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR
PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS
OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY,
TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY
OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the
liability of Horizon exceed the individual price of the Product on
which liability is asserted. As Horizon has no control over use, setup,
nal assembly, modication or misuse, no liability shall be assumed
nor accepted for any resulting damage or injury. By the act of use,
setup or assembly, the user accepts all resulting liability. If you as the
purchaser or user are not prepared to accept the liability associated
with the use of the Product, purchaser is advised to return the Product
immediately in new and unused condition to the place of purchase.
Law
These terms are governed by Illinois law (without regard to
conict of law principals). This warranty gives you specic
legal rights, and you may also have other rights which vary
from state to state. Horizon reserves the right to change or
modify this warranty at any time without notice.
WARRANTY SERVICES
Questions, Assistance, and Services
Your local hobby store and/or place of purchase cannot
provide warranty support or service. Once assembly, setup or
use of the Product has been started, you must contact your
local distributor or Horizon directly. This will enable Horizon to
better answer your questions and service you in the event that
you may need any assistance.
For questions or assistance, please visit our website at
www.horizonhobby.com, submit a Product Support Inquiry, or
call the toll free telephone number referenced in the Warranty
and Service Contact Information section to speak with a
Product Support representative.
EN
5SPEKTRUM SLT3 USER GUIDE
EN
Inspection or Services
If this Product needs to be inspected or serviced and is
compliant in the country you live and use the Product in,
please use the Horizon Online Service Request submission
process found on our website or call Horizon to obtain a
Return Merchandise Authorization (RMA) number. Pack the
Product securely using a shipping carton. Please note that
original boxes may be included, but are not designed to
withstand the rigors of shipping without additional protection.
Ship via a carrier that provides tracking and insurance for
lost or damaged parcels, as Horizon is not responsible for
merchandise until it arrives and is accepted at our facility.
An Online Service Request is available at http://www.
horizonhobby.com/content/service-center_render-servicecenter. If you do not have internet access, please contact
Horizon Product Support to obtain a RMA number along with
instructions for submitting your product for service. When
calling Horizon, you will be asked to provide your complete
name, street address, email address and phone number
where you can be reached during business hours. When
sending product into Horizon, please include your RMA
number, a list of the included items, and a brief summary
of the problem. A copy of your original sales receipt must
be included for warranty consideration. Be sure your name,
address, and RMA number are clearly written on the outside
of the shipping carton.
NOTICE: Do not ship LiPo batteries to Horizon. If you
have any issue with a LiPo battery, please contact the
appropriate Horizon Product Support ofce.
Warranty Requirements
For Warranty consideration, you must include your original
sales receipt verifying the proof-of-purchase date. Provided
warranty conditions have been met, your Product will be
serviced or replaced free of charge. Service or replacement
decisions are at the sole discretion of Horizon.
Non-Warranty Service
Should your service not be covered by warranty, service
will be completed and payment will be required without
notication or estimate of the expense unless the expense
exceeds 50% of the retail purchase cost. By submitting
the item for service you are agreeing to payment of the
service without notication. Service estimates are available
upon request. You must include this request with your item
submitted for service. Non-warranty service estimates will
be billed a minimum of ½ hour of labor. In addition you will
be billed for return freight. Horizon accepts money orders
and cashier’s checks, as well as Visa, MasterCard, American
Express, and Discover cards. By submitting any item to
Horizon for service, you are agreeing to Horizon’s Terms and
Conditions found on our website http://www.horizonhobby.
com/content/service-center_render-service-center.
ATTENTION: Horizon service is limited to Product
compliant in the country of use and ownership. If
received, a non-compliant Product will not be serviced.
Further, the sender will be responsible for arranging return
shipment of the un-serviced Product, through a carrier of the
sender’s choice and at the sender’s expense. Horizon will
hold non-compliant Product for a period of 60 days from
notication, after which it will be discarded.
10/2015
WARRANTY, SERVICE AND CUSTOMER SERVICE CONTACT INFORMATION
Country of
Purchase
North America
European Union
6 SPEKTRUM SLT3 USER GUIDE
Horizon Hobby Phone Number/Email Address Address
Horizon Service Center
(Repairs and Repair Requests)
Horizon Product Support
(Product Technical Assistance)
Sales
Horizon Technischer Service service@horizonhobby.eu
Sales: Horizon Hobby GmbH +49 (0) 4121 2655 100
servicecenter.horizonhobby.com/
RequestForm/
productsupport@horizonhobby.com
877-504-0233
websales@horizonhobby.com
800-338-4639
Champaign, Illinois, 61822 USA
D 22885 Barsbüttel, Germany
2904 Research Rd
Hanskampring 9
FCC INFORMATION
FCC ID: BRWSPMSLT300, BRWSRIRVINGV1
FCC NOTE: This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including
interference that may cause undesired operation.
NOTE: THE GRANTEE IS NOT RESPONSIBLE FOR ANY
CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED
BY THE PARTY RESPONSIBLE FOR COMPLIANCE. SUCH
MODIFICATIONS COULD VOID THE USER’S AUTHORITY TO
OPERATE THE EQUIPMENT.
NOTE: This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules.
These limits are designed to provide reasonable protection
against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which
can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician
for help.
The device has been evaluated to meet general RF exposure
environment.
To maintain compliance with FCC’s RF exposure guidelines,
the distance must be at least 20cm between the radiator
and your body, and fully supported by the operating and
installation configurations of the transmitter and its antenna(s)
IC INFORMATION
IC: 6157A-SPMSLT300, CAN ICES-3 (B)/NMB-3(B)
This device complies with ICES Canada license-exempt
RSS standard(s). Operation is subject to the following two
conditions:
(1) this device may not cause interference, and (2) this device
must accept any interference, including interference that may
cause undesired operation of the device.
COMPLIANCE INFORMATION FOR THE EUROPEAN UNION
Horizon Hobby, LLC hereby declares that this
product is in compliance with the essential
requirements and other relevant provisions of
the RED Directive.
A copy of the EU Declaration of Conformity is available online at:
http://www.horizonhobby.com/content/support-render-compliance.
Frequency Band: 2403-2480 MHz
Max EIRP: 45mW
collection point for the recycling of waste electrical and
electronic equipment. The separate collection and recycling
of your waste equipment at the time of disposal will help to
conserve natural resources and ensure that it is recycled in
amanner that protects human health and the environment.
For more information about where you can drop off your
waste equipment for recycling, please contact your local city
ofce, your household waste disposal service or where you
purchased the product.
Instructions for Disposal of WEEE
by Users in the European Union
This product must not be disposed
of with other waste. Instead, it is the
user’sresponsibility to dispose of their waste
equipment by handing it over to adesignated
EN
7SPEKTRUM SLT3 USER GUIDE
© 2020 Horizon Hobby, LLC.
DSM, DSM2, DSMR, SLT3, and the Horizon Hobby logo are registered trademarks of Horizon Hobby, LLC.
The Spektrum trademark is used with permission of Bachmann Industries, Inc.
Created: 7/2020 SPMRSLT300, SPMSLT300, SPMSLT310 65057
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