Xiaomi's self-developed dual-microphone noise reduction algorithm, combined with an independent anti-wind noise cavity design, can achieve a wind noise reduction effect of up to 9m/s The dual MIC active noise reduction function can accurately detect ambient noise and intelligently respond to various noise scenarios. It supports adaptive noise reduction functions. Every time you wear it, the algorithm automatically adjusts the noise reduction effect to experience a unique silent space The 14.2mm large dynamic unit is equipped with a 0.45mm large amplitude and is tuned by the Xiaomi Acoustic Laboratory Golden Ear Team. The high frequencies are pure and transparent, and the low frequencies are surging and rich The lightweight body is equipped with strong battery life. The earphones can last up to 7 hours on a single charge, which meets daily work and commuting needs. With the charging box, it can last up to 33 hours. It also has a super fast charging speed, which allows for quick recovery and long-lasting listening Bluetooth 5.3 technology, fast and stable connection Specifications: Bluetooth version: 5.3 Communication distance: 10 meters (barrier-free open environment) Audio encoding: AAC, SBC Net weight of single earphone: about 3.9g Total weight including charging box: about 38g Earphone charging time: about 60 minutes Charging box charging time: about 120 minutes Earphone size: 30*17.95*18.53mm Charging box size: 61*50*24.7mm Charging interface: USB-C Charging case battery: 480mAh Earphone battery: 37mAh