Xiaomi Band 9 - Ultra-Long 21-Day Battery Life, 4.11cm AMOLED Display, 150+ Sport Modes, Wireless 5.4, Silicone Strap, USB Charging - Sleek Black Fitness Tracker with Ambient Light Detection for Android & iOS reviewsOverviewReviews 00 reviews for Xiaomi Band 9 - Ultra-Long 21-Day Battery Life, 4.11cm AMOLED Display, 150+ Sport Modes, Wireless 5.4, Silicone Strap, USB Charging - Sleek Black Fitness Tracker with Ambient Light Detection for Android & iOSTo add a review please sign up or login