EC Buying 5Pcs Bluetooth Decoding Board XY-BT-Mini MP3 Bluetooth 4.1 Amplifier Module Car Speaker Power Amplifier Board Bluetooth 4.1 Circuit Board WAV+APE+FLAC+MP3

Parameters Power Supply: DC 3.7V-5V Size: 30*30mm/1.81*1.81in SNR: 90dB THD+N: -70dB Crosstalk: -86dB DNR: 91dB Support Profile: A2DP/AVCTP/ AVDTP/AVRCP/HFP LOS: >15m Interface specification USB power supply: Universal Micro USB 5V power supply 3.7-5V power supply pad: Realize external 3.7-5V lithium battery power supply modification LED indicator: Bluetooth mode blue light long-on 3.5mm stereo audio interface: Standard 3.5mm interface, output stereo sound source, can be inserted into headphones, connected to a power amplifier and other devices R: Right channel L: Left channel GND: ground