Specifications:
 Wireless Version: V4.1
 Charging Time: About 2.5 hrs
 Working Time: about 8hrs
 Standby time: about 200hrs
 Working distance: 10M
 Operating Frequency: 2.402GHz-2.480GHz
 Battery: 200mAh polymer lithium battery
 Speaker Unit: 40mm
 Material: ABS+PC,protein leather