35dB Smart noise cancellation Dual-device connectivity Wireless charging 28h long battery life The earbuds adopt the dual active noise cancellation technology with feedback and feed-forward microphones. They effectively cancel ambient noise and reduce excess noise in the ear canal. Noise cancellation can be as deep as 35dB/ The AI algorithm judges the scene based on ambient noise level and usage habits. Adjust the noise cancellation depth for different environments. The three microphones together with the call noise cancellation algorithm enabled through the neural network model can accurately pick up people's voices while effectively reducing background ambient noises. This allows for clear conversations without interference in noisy environments. When transparency mode is turned on you can still hear ambient sounds without having to take out the earbuds. Switch to enhance voice mode for clearer voice. You can have a relaxed conversation with your friend with your earphones on. 9 mm composite vibrating diaphragm coil provides you with an excellent audio experience. After being tuned by a professional from Xiaomi’s internal sound lab a high-pitched sound is clear and not distorted while a low-pitched sound is rich and pure with more refined sound quality. With a built-in low-power chip the earbuds can operate up to 6 hours* for a single charge. With the assistance of a charging case the earbuds can operate up to 28 hours. With fast charging the earphones can charge for just 10 minutesTouch the rear of the earbuds for controls including switching modes music pause and playback etc.  Also supports the wake-up voice control feature. and then allow you to listen to music for up to 3 hours. If the battery is running low take a short break and let it power up. The charging case also supports Qi wireless charging making charging super convenient.