Wireless Version: 5.3
Operation Distance: 10m
Frequency Range: 2.402GHz-2.480GHz
Speaker: 3-5mW; Φ13mm;
Impedance: 32+/-15%, at1000Hz
Frequency: 20Hz-20000Hz
Sensitivity: 103dB+/-3
Earphone Battery: 30mAh
Charging Time: 1 H
Playing Time: 4-5 H
Charging Case: 300mAh
Charging Time: 2H; 3 Times