Bluetooth Receiver / Car Kit, Atill Portable Wireless Audio Adapter 3.5 mm Stereo Output (Bluetooth 4.1, A2DP, Built-in Microphone) for iPhone Samsung Android,Headphone,Speakers and More Latest Bluetooth 4.1 technology: (fully backward compatible) for full-speed transmission and low power consumption. When the call comes, short press the function button to answer it in hands-free mode or long press the function button to reject the call. Super clear and flow conversation effect. Simple operation: Easy to setup, plug and play, no driver required, no APP download needed. Plug the Atill Bluetooth Audio Receiver into your stereo speaker by using the 3.5mm audio connector, and pair with any Bluetooth enabled devices to enjoy your music! Two-Link: Connect two Bluetooth devices at the same time. Automatically connect back functionIf completed Bluetooth pairing for the receiver and your cell phone in first time using, in next time using, just turn on the Bluetooth of the cell phone first, then turn on the Bluetooth receiver, it can be automatically connect. Wide Compatibility: It is compatible with car stereo/home stereos/headphones etc. by 3.5mm stereo inlet socket. Inner 250mAh Li-Battery, over length battery working time. Package and Warranty: 1 pack Bluetooth audio receiver, 1 pack Micro USB Cable, 1 pack 3.5mm Audio Cable, 1 Pack 3.5mm audio metal adapter and 1 paper user manual.12 months worry-free product guarantee from Atill and Professional technical support. Efficient and always satisfying customer service.