World-leading active noise cancellation technologyEquipped with a powerful ANC chip, with noise-canceling capability up to 40dB. 3-mic noise cancellation for clear calls even in noisy places. 3 ANC modesLight mode for relaxing in a parkBalanced mode for walking around an office buildingDeep mode for a noisy subway ride. Double magnetic dynamic driverThree wideband frequencies and a sensitive transient response provide better sonic definition. Hi-Fi level sound qualityXiaomi Audio Laboratory professional tuning, according to physical acoustics and psychological acoustics for detailed frequency response curve tuning. Wear these headphones like in a professional recording room. Connectivity to two devicesThey can be connected to two devices simultaneously.Connect smartphones, tablets, PCs and other smart devices Supports wireless chargingIt is compatible with Qi-certified chargers Technical specificationsBattery capacity: earphone 38 mAh, charging case 480 mAhBattery life: 7 hours (without ANC), 32 hours (without ANC)Charging: Type-CCommunication range: 10 metersConnectivity: Bluetooth 5.2Charging time: approximately 83 minutes