Specification:
Version : V4.5
Chipset : Wt200S
Drive Unit:Φ40mm  
Working Frequency : 2.402GHz-2.480GHz 
Battery Capacity : 350mAh / 3.7V 
Charging Current : ≤500mA 
Charge Time : ＜2 hours 
Playing Time : Up to 12 hours 
Talking Time : Up to 13 hours 
Wireless Distance:≥10m   
Frequency Response : 20-20KHZ 
Distrotion : ≤ 0.1%
Weight: 182.5g