ITEM NAME:3.7-5V Mini Bluetooth MP3 Decoder Board Power amplifier Board 4.1 Bluetooth W9U4 1.Parameter characteristics Power Supply 3.7-5V SNR 90dB THD+N -70dB Crosstalk -86dB DNR 91dB Support Profile A2DP/AVCTP/AVDTP/AVRCP/HFP LOS >15m 2.Interface details USB.As shown below. LED indicator Bluetooth mode long blue light. 3.5mm stereo audio interface Standard 3.5mm interface, output stereo sound source, plug in headphones, connect amplifiers and other devices.
