Shell material: ABS
Item model number: BT30
Charging time: about 3 hours
Bluetooth version: V5.0
Operating frequency: 2.4GHz-2.48GHz
Transmission distance: 10 meters
Speaker: 320/40mm/20-20KHz
Battery capacity: 600mAh
Noise reduction decibel: 25dB-30dB
Noise reduction alone: 40 hours
Call microphone: -38+/-3dB/20-16Hz
Listening time: 35 hours
Noise-cancelling microphone: -34+/-3dB/10-10KHz
Noise reduction listening to music: 30 hours
Impedance: 32ou
