Xiaomi Watch S1 Pro A classic fit Color Black stainless steel case; black fluororubber strap Dimensions 46mm x 46mm x 11.28mm *Height, width and thickness dimensions exclude the strap and protrusions 48.5g (only watch body) Strap TPU strap adjustable size: 140-210mm Leather strap adjustable size: 135-205mm Sensors Heart rate sensor (with blood oxygen sensor), accelerometer, gyroscope, geomagnetic sensor, atmospheric sensor, ambient light sensor, cap sensor, temperature sensor Satellite positioning systems Beidou/GPS/GLONASS/Galileo/QZSS Material Sapphire (cover glass + heart rate window), stainless steel frame body Battery Charging type: wireless charging Charging time: ≤85 mins Typical use time: 14 days Capacity: 500mAh Display 1.47 inch AMOLED Touch Display Resolution: 480 x 480 pixel Brightness: up to 600 nit, adjustable Sapphire glass with anti-fingerprint coating Specifications Microphone supported Speaker supported 5ATM water resistant Bluetooth 5.2 + BLE Operating system: Android 6.0 or higher, iOS 11 or higher Package contents Watch/Wireless Charging Dock (including charging cable)/User Manual (including warranty notice)