Brand Xiaomi Colour Space Black Ear placement In Ear Form factor In Ear Impedance 16 Ohm About this item Innovative triple driver technology: a 11 mm bass driver with titanium diaphragm and two 6.7 mm ceramic tweeters ensure precise Hi-Fi sound and optimal sound quality in all frequencies. 55dB Active Noise Cancellation: With 20 adjustable ANC modes and 4kHz ultra-wide frequency noise cancellation, ambient noise is effectively reduced. Hi-Res Audio Wireless Certified: Supports LDAC audio codec for lossless, wireless sound quality. Immersive 3D Audio: Built-in motion sensor dynamically detects head position to create an intense and engaging 3D sound experience. 36 hours battery life: up to 9 hours of listening time per charge (ANC off) and 36 hours total with charging case, including fast charging via USB-C.