Hybrid Noise Cancellation 35dB Noise Cancellation helps you enjoy a world without unnecessary noise. The headphones use a dual active noise cancellation technology with both feedback and feedforward. Use them on the plane, in the subway/train, in noisy environments like cafes. If you want to focus, they're perfect for taking to work or the library. Three microphones eliminate sound The three microphones, along with the call noise reduction algorithm, capture and let human voices through while effectively reducing background noise. Enabling clear and distinct conversations without interference from noisy surroundings. With a single button press, you activate transparency mode which lets all sounds pass through again. 28h battery life & wireless charging With a built-in low-power chip, the earbuds can operate for up to 6 hours on just one charge. Using the charging case, the earphones can operate for up to 28 hours. With fast charging, the earphones can be charged in just 10 minutes, giving you up to 3 hours of listening time. The charging case also supports wireless Qi charging, making charging even better.