Specification Of MP3 Bluetooth Receiver Board Amplifier Module for Car Speaker Amplifier: Model: XY-BT-MINI Work voltage: DC 3.7V-5V/Micro USB Output Power: 3W*2 Audio Socket: 3.5mm Size: 68*48*10mm SNR: 90dB THD N: -70dB Crosstalk: -86dB DNR: 91dB Support Profile: A2DP/AVCTP/AVDTP/AVRCP/HFP LOS: >15m Bluetooth version: 4.1 Features Of Bluetooth Stereo Audio Receiver Circuit Board : Bluetooth wireless connection. Longest communication distance is 20 meters. Support decoding function. Pairing voice prompts. Easy to use, just need power and a headset. Small size. Simple wiring. Stable output. User Instructions: Connect input power from Micro USB or pads. The power indicator LED will ON. Connect to the headset or speakers or amplifiers. It will into Bluetooth mode and it is ready to pair after power on. The Bluetooth name is ‘ XY_BT ’. Pair and connect to Bluetooth. You will hear the prompt voice ”The Bluetooth device is connected successfully”. Play music. Package Include: 1x Mp3 Bluetooth Decoder Board Mini XY-BT