Hybrid Active Noise Cancellation: Perfect for working at home, taking online classes, commute or traveling. Escape the noise of the city with industry-leading noise cancellation. It analyses personal characteristics like head size, glasses and hair, then optimizes sound to you. Feed-forward and feedback ANC to Reduce Ambient noises by up to 90%. Hi-Fi Audio Sound & Strong Bass: Dual 40mm large-aperture drivers to produce powerful sound and rich music with lesser audio delay. Deep, accurate bass response. Double press the Volume down button to change the band of EQ for an amplified listening experience. 30-Hour Playtime & USB-C Turbo Charging: A single charge keeps you powered all day with 30 hours of continuous play time. Or a 10-minute quick charge provides up to 2 hours of listening. Bluetooth 5.0 and CVC 8.0 Mic: Upgrade Bluetooth 5.0 technology to ensure ultra-fast and stable connection. The CVC 8. 0 noise-cancelling microphone for hands-free calling means you can hear clearly on the phone. C751 Hybrid Active Noise Cancelling Headphones, Over Ear Wireless Bluetooth Headphone with CVC 8.0 Mic, Hi-Res Sound, Custom EQ, 30H Playtime, Comfortable Fit, Bluetooth Headphones