Audio receiver, bluetooth receiver, car speaker, wireless bluetooth adapter/receiver design"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 happiness2.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 calls4.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"