Bluetooth Transmitter & Receiver
User Manual
Model:I3
Contents:
1. Product Overview-------------------------------------------------------------- 2
2. Basic Operation --------------------------------------------------------------- 3
3. How to use as a Bluetooth Transmitter (TX)---------------------------------- 4
4. How to use as a Bluetooth Receiver (RX)------------------------------------ 7
5. How to use BYPASS function--------------------------------------------------10
6. LED Indicator -----------------------------------------------------------------11
7. Product Specification----------------------------------------------------------12
8. Attention and Q & A----------------------------------------------------------13
1. Product Overview
USB DC Power Supply Port / AUX Output Port / SPDIF Output Port / SPDIF Iinput Port / AUX
Input Port
Working Status Switch/ Working Status Indicator / Audio Mode Indicator / Connected Device
Indicator / CODEC Indicator / Multi Function Button(MFB) / Audio Mode Switch / Volume - /
Volume +
Package Contents
Button
Function
Operation
MFB (Multi
Function
Button)
Pairing mode
Double press when in standby or connected status.
(Not work in Multi Point Connection)
Play / Pause (RX)
Short press when playing music
*Not work in TX mode
aptX™ HD on /
off (TX / RX)
Under power on status, long press for 7 seconds
Volume +
Volume + (RX)
Short press
Next song (RX)
Long press for 1 second
Volume -
Volume - (RX)
Short press
Previous song
(RX)
Long press for 1 second
Working Status
Switch
Switch to RX side for receive status, switch to TX side for transmit status,
switch to BYPASS for direct connection status.
Audio Mode
Switch
Short press to switch between AUX and Optical.
：
A. Bluetooth Transmitter & Receiver *1
B. 3.5mm Audio Cable *1
C. Micro USB Charging Cable *1
D. User Manual *1
E. Fiber Optic Cable *1
2. Basic Operation
3. How to use as a Bluetooth Transmitter (TX)
3.1 Bluetooth pairing and connection
A. Plug USB DC power supply to power on, switch to TX status. Or switch to TX status
then power on.
B. It will enter pairing status automatically with TX LED fast flash (You could double
press MFB to enter pairing mode if it didn’t enter).
C. Turn on the Bluetooth function of your device (bluetooth headphone, speaker or
receiver) to pairing mode with Red & Blue LED flash alternately or Blue LED flash.
D. Place KH21 and the device close and wait for 5-30 seconds, after successful
connection, KH21 turn to solid TX LED , solid A LED, and solid CODEC LED , please
refer to Point 6.
E. Connect KH21 with phone or TV through 3.5mm audio cable or fiber optic cable,
the music can be heard from headphone or speaker.
1 Setting Under power off status switch to TX side then plug power supply cable to power on, or
under power on status switch to TX side.
2 Paring Power on, you could double press MFB if it didn’t enter pairing status automatically
with TX LED fast flash. Place bluetooth headphone or speaker power on and enter pairing status.
3 Connection Place them close and wait for 5-30 seconds, after successful connection, KH21’s
CODEC LED turn on.
3.2 Multi Point Connection
A．Follow 3.1 to connect with the first device, double press MFB button to enter
into pairing mode with TX LED fast flash (The first connected device will work
well).
B. Turn on the second device (bluetooth headphone, speaker or receiver) enter
into pairing mode, place it close with KH21 and wait for 5-30 seconds, KH21 will
connect two device with “A” “B” solid Blue LED (The first device will have music
issue when connect to second device, then it will be fine after few seconds).
Note
：
*If KH21 can not connect two devices, please power on again and try to
reconnect, or try to pair two devices again.
*Multi Point Connection can be compatible with most of bluetooth device, but
there are some devices maybe have some problem when connect with it.
3.3 TV Connection
Connect KH21 and the TV with 3.5mm audio cable or fiber optic cable, and
Bluetooth connect with headphone or spkeaer, play music from TV to
headphone or speaker.
Notes
：
*Please test the TV with wired headphone by selecting 3.5mm output to check the TV's
audio settings to make sure the devices connect in the right way and play audio from the
TV.
*If bluetooth headphone can not hear sound from TV, please check the TV audio setting,
normally can output sound one of them or all: fiber optic, 3.5mm, tv speaker.
*Please insert fiber optic cable to TX-Input-OPTICAL port , insert 3.5 mm audio cable to
TX-Input-AUX port.
4. How to use as a Bluetooth Receiver (RX)
4.1 Bluetooth pairing and connection
A．Connect USB DC power supply to power on, switch to RX status. Or switch to
RX status then power on.
B．It will enter pairing status automatically with RX LED fast flash (You could
double press MFB to enter pairing mode if it didn’t enter).
C．Place KH21 and your phone (PC or tablet) close, turn on bluetooth function
then search and connect BT-BA002. The RX LED will turn on, meanwhile “A” and
CODEC LED also turn on, please refer to Point 6.
D．After successful connection, the speaker can be played music from phone
(PC or tablet) with 3.5mm audio cable or fiber optic cable connect to KH21.
1 Setting Under power off status, switch to RX then plug power supply cable to power on. Or
under power on status switch to RX side.
2 Pairing Please double press MFB to enter pairing status with RX LED fast flash if didn’t enter
pair status.
3 Connection Turn on the bluetooth function of phone (PC or tablet), search and connect KH21.
After successful connection, KH21’s RX and CODEC LED will turn to solid.
4.2 Multi Point Connection
A. Follow 4.1 to connect with the first phone (PC or tablet).
B. Double press KH21’s MFB to enter pair status with RX LED fast flash (The first
connected device will work well).
C. Turn on the bluetooth function of the second phone (PC or tablet), search and
connect KH21’s pair name. Multi point connection is working with “A” “B” LED
turn on.
Note
*Only could play music from one phone when with two connections. Need to
stop the first one’s music then to play the other one’s music.
4.3 Speaker Connection
Connect KH21 and Speaker with 3.5 mm audio cable or fiber optic cable, and
bluetooth connect with phone (PC, laptop), play music from your phone to
speaker.
Notes
：
*Please test the speaker with 3.5 mm audio cable (connect with phone) to see if
workable, if could not play when connect with KH21.
*Please insert fiber optic cable to RX-Output-OPTICAL for Toslink connection, RXOutput-AUX for 3.5mm connection.
5．How to use BYPASS function
Enter BYPASS: Plug DC power supply, switch to BYPASS status with solid BYPASS
LED. BYPASS mode is direct connection, short press Audio Mode Switch to select
between AUX and OPT.
1. Solid AUX LED : AUX-Input to AUX-Output
2. Solid OPT LED: OPT-Input to OPT-Output
3. AUX LED flash once, then turn to solid AUX and OPT LED: AUX-Input to OPTOutput
4. OPT LED flash once, then turn to solid OPT and AUX LED: OPT-Input to AUXOutput
6. LED Indicator
Status
LED Indicator
Power on
TX flash twice (TX status)
RX flash twice (TX status)
Power off
All turn off
Paring
TX fast flash (TX status)
TX fast flash (RX status)
Unconnected standby /
Reconnecting
TX flash once every 3 seconds (TX status)
RX flash once every 3 seconds (RX status)
Connected with once device
“A” turn on
aptX-HD™ on
TX is on for 1.5 seconds (TX / RX status)
aptX-HD™ off
TX flash twice (TX / RX status)
Connected with two devices
“A” and “B” turn on
Connected working status
aptX™ HD
HD turn on
aptX™ low latency
LL turn on
aptX™
APTX turn on
SBC
N/A
7. Product Specification
Bluetooth version
V5.0
Bluetooth chipset
CSR 8675
Operation range
RX: 15 meters, TX: 50 meters
Bluetooth profile
A2DP, AVRCP
CODEC
aptX™ HD, aptX™ low latency, aptX™ , SBC
Working temperature
-10-55℃
Net weight
About 81.5g
dimension
132*75*29MM
7.
Attention and Q & A
A. How to reconnect?
A: KH21 will reconnect with paired devices when power on. If not , please follow
the 3.1 or 4.1 to pair & connect again.
B . How to delete the paired records?
A: Under TX and power on status, long press ”Volume +” 7 seconds to delete the
paired records, TX and RX will flash twice simultaneously (Not work in RX status).
C . Password for connect?
A: Please enter “0000” (four zero), “8888” (four eight), ”1111” (four
one), or “1234” (one, two, three, four) for some devices which need password
to connect
D. Could not power on or dead when connect?
A: Please plug power supply again.
E. How to do if can’t connect?
A: Please try delete the paired records of KH21 and the other devices
F. How to turn on / off aptX-HD?
A: Under power on status, long press MFB for 7 seconds turn on / off HD mode
(KH21 will reset and power on then reconnect the devices)
FCC STATEMENT :
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.
Warning: 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 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.
FCC 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 & your body.
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