1.Updated Version:You can connect to your smartphone to enjoy wireless high-quality stereo music and hands-free calling. Intelligent noise reduction.  Pen-clip design, Easy to carry, easy to answer calls during fitness or exercise, Enjoy wireless happiness 2.Easy to Use: You can play/pause/skip music/answer a call/redial the last called number or control the music on the receiver. Built-in rechargeable battery, providing up to 8 hours of playback and talk time, charging can be completed in about 1.5 hours. 3.Connect to this Bluetooth receiver via a 3.5mm audio cable/adapter, then pair your phone for easy listening/navigation or answering calls 4.Unbelievable Features: This mini Bluetooth receiver can connect two Bluetooth devices at the same time. Built-in microphone for hands-free calling while driving. Designed with independent volume “+/-” buttons for perfect control of voice up/down and play/pause. 2-in-1 Bluetooth Assist Adapter Support > 8 hours of continuous wireless audio playback time, automatically re-pairing with the last paired device 5.Perfect Compatibility: The Bluetooth Stereo Audio Receiver Adapter is suitable for most Bluetooth devices such as mobile phones, Pod, Pad, Samsung, LG, Huawei, HTC and other Android smartphones. Simply plug in a 3.5mm auxiliary audio jack device, such as speakers, headphones, car, home stereo, and let your device instantly have wireless Bluetooth and provide high-fidelity stereo for wireless enjoyment