Description <br> Product: Wireless audio receiver <br> Bluetooth-Compatible version:V5.3 <br> Frequency range:2.402GHZ-2.480GHZ <br> Power input port:USB TYPE-CDC5 V <br> Bluetooth-compatible protocol:A2DP/AVRCP/HFP/ <br> <br> Audio output interface:3.5mm stereo sound frequency port <br> Bluetooth-compatible audio decoding:,AAC <br> Standby time: 30 days <br> Microphone sensitivity: -40dB 2dB <br> Transmission distance: 10 meters <br> in battery:200mAh <br> Charging time:about 2H <br> Working hours: 8 hours <br> Audio output:3.5 MM audio output interface <br> Colour:Black <br> Material:plastic <br> <br> Package Contents: <br> 1 x wireless audio receiver <br> <br> Only the above package content, other products are not included. <br> 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. <br>