Large display, timeless beauty: A large 1.43" AMOLED display, built with advanced display and energy-saving technology, coated by the sapphire crystal, will give you an amazing visual experience, turning the slow passing by of time into an art. Supports always on display*.Sapphire glass: Sapphire glass* is extremely hard and wear-resistant, with scratch resistance far exceeding that of ordinary glass. The finely carved sapphire glass glitters from every angle.Showcase your taste with a tilt of the wrist: Xiaomi Watch S1 offers two inbox straps: a premium leather strap and a dirt-resistant fluororubber strap. One for you to look the part for those special occasions, the other to give you comfort for your exercises. Both straps are lightweight, soft and skin-friendly.Long battery life: The Xiaomi Watch S1 is equipped with an extra-large 470 mAh battery which greatly extends usage time, so you don't have to be inconvenienced by frequent charging. With the all-new Xiaomi Watch S1 magnetic wireless charging dock, you can charge quickly no matter where you are.Free your hands with Bluetooth phone calls: When your phone receives a call, you can answer it on your watch with one touch and talk directly into the watch*, thanks to the built-in microphone and speaker.NETWORKTechnologyNo cellular connectivity2G bandsN/A3G bandsN/A4G bandsN/ASpeedNoGPRSNoEDGENoLAUNCHAnnounced2021, December 28StatusAvailable. Released 2021, December 31BODYDimensions46.5 x 46.5 x 11 mm (1.83 x 1.83 x 0.43 in)Weight53 g (1.87 oz)BuildSapphire crystal front, stainless steel frame, plastic backSIMNo Waterproof (5ATM)DISPLAYTypeAMOLEDSize1.43 inchesResolution466 x 466 pixels (~326 ppi density)PLATFORMOSProprietary OSMEMORYCard slotNoInternalUnspecified storageCAMERA NoSOUNDLoudspeakerYes3.5mm jackNoCOMMSWLANWi-Fi 802.11 b/g/n (China only)Bluetooth5.2, A2DP, LEPositioningGPS (L1+L5), GLONASS, GALILEO, BDS, QZSSNFCYesRadioNoUSBNoFEATURESSensorsAccelerometer, gyro, compass, barometer, heart rate, SpO2BATTERYTypeLi-Po 470 mAh, non-removableChargingWirelessMISCColorsBlackModelsM2112W1