Wireless Version: 5.3
Wireless Frequency: 2.4 -2.480GHZ
Operation range: 10M
Speaker Diameter: 40 mm
Impedance: 32Ω±15%
Mic Speaker Sensitivity: 103±3dB
Battery: 500mAh
Music Play: 45H
Talking: 3H
Standby Time: 500H Charging time: 2.5 H
6 months warranty