Rainbuvvy HK24 smart watch 2.01 inch AMOLED screen Bluetooth call health monitoring heart rate sleep monitoring NFC sports watch

Screen: 2.01 inch Pixel: 240*296 Touch type: full screen touch Main body: zinc alloy + tempered glass Wristband: silicone strap BT: BT5.3 Compatible systems: Android4.4 (inclusive) and above, IOS9.0 (inclusive) and above APP:CO-FIT Watch head: 52.3*43*11mm Watch strap: total length 220MM, adjustable length 145-190MM Functions: Bluetooth calls, voice control, always-on screen, games, NFC, stress test, breathing training, calendar, world clock, computer, password unlock, custom watch face, weather forecast, music control, step counting, heart rate, Sleep, sedentary time, mileage, search, calories, message push, etc.