DIY Bluetooth-compatible Audio Receiver Module BT5.0 3.5mm MP3 Wireless Stereo Music Player PCB Decoder Board
Feature:
Support Bluetooth-compatible 5.0.
Support Automatic Connection Function.
Support WAV+APE+FLAC+MP3 Lossless Decoding, Stereo Output.

Specification:
Power Supply: 3.7V-5V
SNR: 90dB
THD+N: -70dB
Crosstalk: -86dB
DNR: 91dB
Support Profile: A2DP/AVCTP/AVDTP/AVRCP/HFP
LOS: >15m
USB Power Supply: Universal Micro USB 5V Power Supply
3.7V-5V Power Supply Pad: Realize External 3.7V-5V Lithium Battery Power Supply 
LED Indicator: Blue Light On in Bluetooth-compatible Mode 
3.5mm Stereo Sound Audio Interface: Standard 3.5mm Interface, Stereo Sound Output, Earphones can be Inserted, Power Amplifier and Other Equipment can be connected
Color: Red/White
Product Size: 30 X 30 X 5mm/1.18 X 1.18 X 0.2"
Package Weight: 8g

Instructions:
Use the USB cable for power supply, the blue indicator light flashes, and enter the Bluetooth-compatible mode. When you hear the voice broadcast "The Bluetooth-compatible device is ready to pair", it means you enter the Bluetooth-compatible mode and wait for pairing. The mobile phone Bluetooth-compatible searches for "XY_BT" (the device Name of decoded version), Click and Connect. When you hear the voice announcement "The Bluetooth-compatible device is connected successfully", it means that the decoder board is successfully connected to the mobile phone, and the blue indicator light is on, you can play music, and the blue indicator light flashes.

Note:
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3mm measuring deviation due to manual measurement.