Features:MicroSD/TFUSB ChargingSuper Long StandbyMIC/BXSMIC/AUSLight ColorTech Specifications:Charge time: 2-3 hoursPlaytime: 5-6 hoursBT Version: 5.1Battery: 3.7V 400 mAh LithiumPower Supply: DC 5V 800-1200 mAhRange: 10 metersTransmitting Frequency: 50Hz - 18kHzIncludes:Retro Wireless SpeakerUSB Charging Cable3.5mm Audio CableUser Manual