Bluetooth FM transmitter
BT77D
User Manual
Thanks for choosing our Bluetooth FM Transmitter. This device streams music and calls directly from your Bluetooth device
to the car FM stereo system. The built-in microphone provides you with an amazing hands free function, it also features
Micro SD card that lets you steam your favorite MP3 tunes to your car’s stereo system and charge your phone
simultaneously. It also delivers a deeper bass with touch of the bass button when playing the music. What’s more,it also
equips Dual USB Charging ports ( Q.C 3.0 & 2.4A).This will greatly save your mobile charging time.Please read the User
Manual carefully before using. Hope this device makes your driving more interesting and safer.
Packing contents:
Bluetooth FM Transmitter device
User Guide
3.5mm Aux Cable
Features:
1. Wireless transmits phone call & audio playing to the car FM stereo system via Bluetooth
2. With hands-free calling for driving safety
3. With bass boost functionality which delivers a deeper bass with touch of a button
4. Flexible goose-neck adjusted to find better viewing
5. Big LED display
6. Supports line-out function
7. Support to read Micro SD ( Max 32 GB)
8. Dual USB charger, output 5V/2.4A + QC3.0
9. Voice prompt and hands-free calling for safety driving
10. Adopt the Bluetooth 5.0 Technology
Specifications：
Bluetooth IC: 5.0
Frequency range: 87.5-108.0MHZ
Frequency stability: ±10ppml
Product Input:12-24V
Charger output: 5V/2.4A + QC3.0
SD Card (Max Capacity) :32GB
Music Format: MP3/WMA/FLAC
Audio input:3.5mm stereo jack.
FM Transmission Distance: 2M
Bluetooth Transmission Distance: 7M
Product Size: 8.66*4.2*18 cm
Weight: 85.7g
LED dimension: 2 inches
Material: ABS&PC
Product Overview:
Using FM Transmitter function:
1. Plug the Bluetooth FM transmitter into your vehicle’s cigarette lighter or power port.
2. Tune your radio to an unused FM frequency, then match the same frequency of this unit.
3. Insert a Micro SD card which containing MP3 files into TF card slot of this unit, It will play and transmit the MP3 files
automatically.
4. Line-out function: Plug the provided audio cable into car Aux-in port to connect with car system, Another connector to
the Aux-in port of this unit, When you using this function, The high quality music or phone call will come out from car
system.
5. Music bass boost function: Press the bass button to active the deeper bass when listening the music.
6. Shut Down the FM Transmission: If you don’t need the FM transmission temporarily, Please press and hold for 3
seconds to turn off, But the charging keeps working.
Using Bluetooth function:
1. Using Bluetooth for the first time, you need to pair your mobile phone with this unit. Activate your mobile phone's
Bluetooth function, then search new device. When the mobile phone detects this unit (named as "BT77D"), please pair
or connect by using the original password "0000"
2. On music playing mode, when there is an incoming call, this unit will automatically switch to telephone mode.
3. On music playing mode, simply press the “BASS” button to enjoy louder and deeper bass.
4. On music playing mode, press the “BASS” and hold for 2 seconds to switch the modes between Bluetooth and Micro SD
card reading.
Bluetooth calling:
1. Please press to answer the incoming call or hang off a call.
2. Please press and hold for 2 seconds during call to reject the incoming call in Bluetooth calling mode.
3. Please press twice to dial the last Number automatically.
4. When making a call, you can only dial the phone number by your mobile phone, but once the call connected,
you can use the hands-free function to enjoy it.
Using USB charger function:
This device with dual USB port for charging, One port is 2.4A, Another port is the quick charge 3.0. When this unit powered
from car lighter socket, connect the USB Charger port to your mobile phone or others device with a special USB cable (not
included).
About QC3.0 USB Port:
If your mobile support the Quick charge, it will charge based on Qualcomm QC 3.0 protocol, DC 3.5-6.5V/3A,
6.5V-9A/2A,9-12V/1.5A.
Here also listed the compatible Devices for reference:
Galaxy S7/S6/Edge/Edge Plus, Galaxy Note 5/4/ Edge, LG G4/G5,LG G Flex2,Nexus 6,HTC One M8/ M9,Droid Turbo, Xperia
Z3/Z3 Compact/Z3 Tablet Compact/Z4 Tablet and many more (please check the official Qualcomm QC product list for more
update)
But if you plug mobile which not listed among above, it will detect the phone voltage automatically and output
accordingly.
Operation Guide
On FM transmitter
1. Answer / hang up the call:
Press " " button: answer the call
Press " " button: hang up the call
2.Ignore call
Press “ ” and hold for 3 seconds to reject incoming calls
3.Call last Number
Press “ ” twice to dial the last Number automatically.
4.Private calling
When answering a call ,press “ ” and hold for 3 seconds to switch to private call
mode.
5.Play and Pause the music:
Press “ ” Button: Play the music
Press “ ” Button again: Pause playing
6. Adjust the Volume:
Press” ”and hold for 2 seconds to increase the Volume
Press” ” and hold for 2 seconds to decrease Volume
7.Set frequency:
press “CH+”: increase the frequency
Press ”CH-”: decrease the frequency
8.Choose music:
Press “ ” Button: Play the next song
Press ” ”Button: Play the previous song
9.Bass Booster:
Press “BASS”Button to active the deeper bass music
10.Feature Switch:
Press “BASS”Button and hold for 2 seconds to switch the modes between the Bluetooh
and Micro SD card reading.
About 2.4A USB Port:
This USB port output maximum 2.4A. It will also detect the phone voltage and output accordingly.
Quick Guide:
FCC Warning
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 inte rference received, including interference that
may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance 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 interferenceto 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.
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment
should be installed and operated with minimum distance 20cm between the radiator and your body.
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