1PC Bluetooth 4.1 Audio Receiver A2DP Wireless Adapter for Home Music Sound SystemSpecification: Bluetooth Version: 4.1 Compatibility: Android system， mobile phone or tablet IOS system， and all Bluetooth audio devices. Transmission distance:> 20M (open area) Operating Current: 18-28MA Battery Standard: 300MA Working Hours: 8-10H Charging Time: 3H Output connections: 3.5MM stereo jack Package Include: 1x Audio Receiver1x USB charging cable 1x 3.5MM audio cable 1x Audio adapter cable 1x Instructions