User's Manual

User manual
Bluetooth Audio Transmitter WT-04
What’s inside the box
WT-04 Bluetooth Transmitter
USB-A to Type-C Right Angle Converter
Quick Start Guide
About WT-04
WT-04 adopts advanced CSR8670 chip with apt-X low latency function. It's no need to install driver and
license, plug and play. This device can be plugged into USB port of non-Bluetooth USB digital audio output
devices, and pair with Bluetooth headphone and Bluetooth speaker. So this can achieve wireless transmission, in
addition, it can be connected to two Bluetooth headphones or Bluetooth speakers simultaneously, allow you to
enjoy movie and football matches with your lover and won’t disturb your family.
Corresponding system
The system that can output USB digital audio like Windows / Mac OS / iOS / Android / PS3 / PS4 / PS4 Pro /
Nintendo Switch / USB-A / USB-C (OTG) / Micro-USB (OTG)
Pairing connection
 Pair with Bluetooth devices like Bluetooth headphone / speaker etc, please make sure your Bluetooth headset /
speaker is in pairing mode and is disconnected from other Bluetooth transmitting devices like smartphone / iPad.
 Plug WT-04 into PC, then press the button for 3 seconds until you see the LED indicator of TX is flashing
blue rapidly, it will automatically search and pair with one Bluetooth device. When this product has successfully
paired with Bluetooth device, the flashing LED indicator turns to solid blue. WT-04 can identify Bluetooth
device codec, corresponding codec “SBC / APTX / LL” will automatically display, the corresponding green
LED indicator will be long bright at this time.
 If you want to pair with the second Bluetooth device, keep connecting with the first one, and press the button
for 3 seconds until you see the LED indicator of TX is flashing blue rapidly, it will automatically search and
pair with the second Bluetooth device. When WT-04 was pairing with two Bluetooth devices at the same time,
for details of the Bluetooth device corresponding codec identification, please refer to “Display of codec LED
indicator” on the right.
 Pair again with your Bluetooth devices that have been paired, make sure your Bluetooth devices are in pairing
mode, and plug WT-04 into PC, the LED indicator of TX flashes slowly, at this time WT-04 will automatically
pair with up to two Bluetooth devices that have been paired. When WT-04 was pairing with one Bluetooth
device, just make sure the second Bluetooth device that have been paired is in pairing mode, WT-04 will
automatically pair with it.
Initialization reset
In the power on state, please long press WT-04 button for 10 seconds, and the rapid flashing TX LED indicator
will pause temporarily, then immediately continue to flash rapidly. Initialization reset is complete at this time.
Precautions
 When pairing with two Bluetooth headsets, only one headset microphone can be used.
 Please note the codec display of WT-04 when pairing with two Bluetooth devices.
 Because the USB jack on the TV is almost the input interface, it can’t output audio, so this product is
unavailable on the TV.
 If WT-04 can not pair with Bluetooth device, please try to initialize both Bluetooth devices and WT-04,
then pair them again.
 If use it on Android smartphone, please set the output of smartphone to OTG. Not all Android smartphones
support OTG output.
 When you want to pair WT-04 with Bluetooth headset / speaker, please make sure Bluetooth headset /
speaker is not pairing with other Bluetooth transmitter like smartphone / iPad.
Display of codec LED indicator
 When pairing with one Bluetooth device, WT-04 LED indicator display status
Paired device codec
SBC
APTX
LL
WT-04 LED indicator
display status
Pic 2
Pic 3
Pic 4
 When pairing with two Bluetooth devices at the same time , WT-04 LED indicator display status
Paired device
codec
SBC+SBC
SBC+APTX
SBC+LL
APTX+APTX
APTX+LL
LL+LL
WT-04 LED
indicator display
status
Pic 2
Pic 2
Pic 2
Pic 3
Pic 3
Pic 4
 "LL" in above and below is an abbreviation for aptx Low Latency.
 When pairing with one device, based on the device codec, the corresponding green LED indicator will light.
 When pairing with two devices, based on the lowest codec, the corresponding lowest codec green LED indicator
will light, and the codec of transmitting acoustic signal also becomes the lowest codec.
 For two identical codecs, the corresponding green LED indicator will light.
TX (blue LED indicator）
Pic 1
TX (blue LED indicator）
Pic 2
SBC (green LED indicator）
TX (blue LED indicator）
Pic 3
TX (blue LED indicator）
Pic 4
LL (green LED indicator）
APTX (green LED indicator）