Quick features of the headset: Industry-leading noise cancellation: Advanced QN1 processor for highly effective noise isolation. Long battery life: Up to 30 hours of continuous playback. Fast charging: 10 minutes of charging gives you up to 5 hours of listening. Smart control: Supports "Speak-to-Chat" feature and touch control. I've worn the headphones only a few times, and they are like new. I want 550 for them.