iClever Portable Bluetooth Stereo Receiver Wireless Adapter, Black 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