Specifications * Active Noise Cancellation ANC. * 40mm drivers for powerful sound and high bass. * Battery up to 60 hours without ANC, and about 40 hours with ANC. * Fast charging: 5 minutes charge = 4 hours playback. Reason for selling: The club subscription is over, I swear to God the headset is new, I might have worn it 4 times. I bought it for 230.