Type: active noise cancellation bluetooth headphone
Speaker Unit: Φ40mm*2 32Ω
Call microphone sensitivity:-39+/-3dB
Noise reduction microphone sensitivity:-35+/-1dB
Frequency range: 20Hz~20KHz
Active cancellation: 28~33dB
Power: 3.7V 750mah
Blue-tooth chip: BES2300Y
Blue-tooth version: V5.0
Operation distance: Indoor>15 meters, outdoor>10 meters
Continuous working time: 40 hours
Standby time: up to 6 months