Xiaomi Mi Band 8 Smart Bracelet AMOLED Screen Miband8 Blood Oxygen Fitness Traker Waterproof Xiaomi Band 8 Wristbands Support: IOS and Android. Xiaomi Mi Band 8 CN Version Support: English, Chinese now. Description: Product parameters Product model: M2239B1 Main net weight: approximately 27g, including wrist strap Body size: 48-22.510.99mm Screen size and type: 1.62-inch AMOLED screen Screen resolution: 192-490 Screen brightness: up to 600nit, supporting automatic brightness adjustment Cover plate material: 2.5D reinforced glass cover plate Shell material: PC Sensors: optical heart rate and blood oxygen sensors, six axis motion sensors Waterproof grade: 5ATM Wireless connection: Bluetooth * BLE51 Vibration motor: rotor motor Battery capacity: 190mAh Battery type: lithium-ion polymer battery Charging time: Supports fast charging, with a charging time of approximately 1 hour Wrist strap adjustable length: 135-210mm System languages: Simplified Chinese, Traditional Chinese, English Support system: Android 6.0 or iOS12.0 and above Supporting APP: Xiaomi Sports and Health Specifications: 50 meter waterproof: According to ISO 22810:2010 standard, tested by SGS organization, Xiaomi bracelet 8 standard version waterproof grade report number: GZPL221201181SC; Xiaomi bracelet 8NFC version waterproof grade report number: GZPL22120181602SC, waterproof grade 5ATM (equivalent to a depth of 50 meters underwater). Supports wearing it during swimming in pools, shallow shoals, and other shallow water activities, but is not suitable for hot showers, saunas, and deep diving. It is necessary to avoid direct impact of high-speed water flow during water activities: waterproof function is not permanently effective and may weaken over time. NFC access control function: Only unencrypted and 13.56MHz gate cards on the market can be simulated. Bank cards with gate card functions and gate cards with stored value consumption, public transportation consumption, and