Power Supply: 3.7-5V
SNR: 90dB
THD + N: -70dB
Crosstalk: -86dB
DNR: 91dB
Support Profile: A2DP / AVCTP / AVDTP / AVRCP / HFP
LOS:> 15m

Function and interface definition
Detailed interface description
USB power supply: Universal Micro USB 5V power supply
3.7-5V power supply pad for external 3.7-5V lithium battery power conversion
LED indicator: blue light in blue light
3.5mm stereo audio interface: standard 3.5mm interface, output stereo sound source, can be plugged in headphones, connect power amplifier

 XY-WRBT  Bluetooth Audio Receiver board Bluetooth  5.0 mp3 lossless decoder board Wireless Stereo Music Module  

Working voltage: 3.7 ~ 24VDC
Bluetooth version: 5.0
Transmission distance: 15 meters (visible and unobstructed)
Signal to noise ratio: ≥90dB
Distortion: ≤-70dB
Number of channels: two channels (stereo)
Audio interface: 3.5mm audio interface
Module protection mechanism: reverse power supply protection

Interface Description:

1. The power supply can use Micro-USB mobile phone charger, 3.7-4.2V lithium battery, 3.7-24V DC power supply, any one of the three can be selected.
2. Short-circuit the “on / off contact” for 2 seconds to set the on / off of the decoder board. For battery-powered situations, shutting down when not in use saves power and facilitates modification.

Instructions

       After the power is turned on, the blue indicator light flashes quickly and enters Bluetooth mode; after the “beep tone” is broadcast, it enters pairing mode and waits for pairing; the mobile phone Bluetooth finds “XY-WRBT” (power amplifier board device name), click “XY-WRBT” Connect, play the “prompt tone” after the connection is successful, the indicator light is on, you can play mobile phone music, the indicator light flashes slowly when playing music; after the Bluetooth is disconnected, the power amplifier board is ready for the next pairing, and enter the “prompt tone” after entering Pairing mode is waiting for pairing.

Precautions for using 3.7V lithium battery

1. When the battery is used for power supply, the decoder board automatically shuts down when the battery voltage is lower than 3.3V. After re-powering or fully charging, short-circuit the on / off contact for 2 seconds to start up.

2. When using battery power, if the battery voltage is too low, there may be “sizzling” noise. In this case, the battery needs to be charged.

3. Since there is no lithium battery charging protection circuit on the decoder board, it is recommended to use a lithium battery with a protection board.