Power supply: 3.7-5VSignal to noise ratio: 90DBTotal harmonic distortion + noise: -70dBCrosstalk: -86DBSupport profile: A2DP/AVCTP/AVDTP/AVRCP/HFPmission distance: 15M (open without partition wall)Decoding format: WAV+APE+FLAC+MP3 lossless decoding, stereo outputBluetooth audio: supportAudio external interface: supportUSB power supply: supportSound card function: supportBattery powered: supportModel: BT5.0 AudioGold sinking process: supportDifferent batches may have differences in product appearance and color, which will not affect the useType:BT5.0 Audio Decoder Boardcolor:BlackMaterial:PCBPackage Contents:1 x Bluetooth Audio Decoder Board(with Case)Only the above package content, other products are not included.Note: Light reflection 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.