VolkanoX Silenco series Active Noise Cancelling

Reduce background noise at work, home or when travelling with
incredible Active Noise Cancelling technology. Ambient noise is
detected by an on board microphone and a signal is generated to
greatly reduce external noise like airplane engines, office hubbub or
loud crowds. You will hear and feel the difference!
Operating distance: 10M
Battery: 300mAh
Charging time: about 3 hours
ANC working time: about 8 hours
Driver Unit: 40mm
Sensitivity: 105dB/1mW(S.P.L at 1KHz)
Noise reduction performance: up to 20dB