Function:
Support Bluetooth-compatible 4.1, support automatic link back 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: realizing external 3.7V-5V lithium power supply
LED indicator: Bluetooth-compatible mode, long blue light
3.5mm Stereo Audio Interface: Standard 3.5mm Interface, Output Stereo Audio, Insert Headphones, Connect Power Amplifiers and Other Equipment
Product size: 30mm*30mm*5mm/1.18*1.18*0.19''
Packing weight: 5g

Operation Manual:
1. With USB power supply, the blue indicator flashes and enters Bluetooth-compatible mode; when you hear the voice broadcast "The Bluetooth-compatible device is ready to pair", you enter Bluetooth-compatible mode and wait for pairing; after Bluetooth-compatible searches for "XY_BT" (the name of the decoded device), you click on the connection.
2. When hearing the voice broadcast "The Bluetooth-compatible device is connected successfully", it means that the decoder board is connected to the mobile phone successfully, and the blue indicator lights up long enough to play music, then the blue indicator flashes.

Note:
Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.