Hands-free calling with built in mic: cutting-edge Bluetooth technology provides superior sound quality and up to 30 feet range. Convenient button controls for music, volume, and answering calls. High quality stereo sound with large driver provides deep bass with crystal clear clear highs. Up to 3 hours play time, and it has 400 hours of standby battery life. Keep it Compact Pocket Size and travel friendly. Fully charges in approximately 3 hrs. Connect up to two Bluetooth devices at once by using multi-point connection technology.