Working voltage: DC 2.2V-5.5V
Signal to noise ratio: ≥92dB
Effective distance: barrier-free 10M
Frequency response range: 20HZ-20KHZ
Sensitivity: 98dB
Nominal impedance: 32Ω
Transmission power: Class 2
Headphone battery capacity: 50 mA/pc
Rechargeable battery capacity: 300 mA
Charging input: 5V /500mA
Charging time: about 2 hours
Hours of use: 8-10 hours of talking, 5-7 hours of music playing
Standby time: 10-15 days
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