Bluetooth 5.0 master chip, JL6925A, real stereo 5.0 chip, sound quality is good.Support automatic back connection function, support WAV+APE+FLAC+MP3 lossless decoding, stereo output.Standard 3.5mm interface, output stereo sound source, can plug in headphones, connect amplifiers and other devices.With LED indicator, blue light is long in bluetooth mode.Support configuration files, suitable for A2DP/AVCTP/AVDTP/AVRCP/HFP.Item Type: Audio Receiver ModuleColor: As shown in the picture Supply: 3.7-5VSNR: 90dBTHD: +N-70dBCrosstalk: -86dBDNR: 91dBLOS: more than 15m/49.2ftColour: Picture colorMaterial: ABSSize: 4.5x4.5x1cmPackage Contents:5 * Bluetooth Receiver BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.