... company executive high starting point, strict requirement, the quality and service is essential, truth-seeking, innovation, continuous improvement, ... cover• Rechargeable Li-Ion battery, charging through USB port• 4 hours battery life with both maximum music and light output ... cord plugUSB/5P Output8wBuild-in Lithium Battery WithLi-ion InputBluetooth SupportSupportBluetooth MP3/4, mobile phone,PC etc ...