iClever Portable Wireless Bluetooth Stereo Receiver for All 3.5mm Audio-in Speaker Systems Such as Portable Speakers, Headphones, Home stereo, Car Music Sound Systems Adopt Bluetooth V3.0 technology with superior wireless performance Supports A2DP, enabling your audio device to transfer stereo audio wirelessly; Supports AVRCP for remote play/pause Turns any ordinary speaker system (with 3.5mm audio-in jack) into Bluetooth-enabled music streaming solution with no additional drivers required Embedded Li-ion battery allows for convenient recharging; Energy saving capability: powers off automatically if pairing fails for over 5 minutes