APPs and OS:Worldwide Languages APP 'Huawei Health' for Android 4.4+/iOS 9.0+For Bluetooth:4.2, compatible with 4.0/4.1Screen:0.95 Inch AMOLED Color Touch Screen, Default Band Face Theme changing as ConstellationsFunctions:Some of below functions need set in APP to workCall:Remind/RefusePulse:Continual pulse heart rate monitorRealtime 1 second, Night Sleep Care Infrared Detect ModeMessage/APP:Remind/Showmessage, customize apps permissionSport:Time, Calories, Steps, Distance, Pace,Even Recognize Swimming PostureAlarm:Smart vibrationSleep:Auto track,Professional Multi-Pattern such as snap,TruSleep by CDB, HarvardConvenience:Lift wrist to show, sedentary alarm, timer, stopwatch, brightness etc.Swimmable:5ATM(Swim or Shower in not-hot water), show swimming time and caloriesStrap:Streamline Texture, Skin Care, Nimble Design,Detached Without ScrewdriverStandby:Magnet dock charging, Slight Using 14day, Scientific Sleep ON6daySensors:6-Axis Inertial Sensor, Seperate PPG Sensor, Infrared Detect SensorSize:23g, Strap 126mm+95mm, Main Body 43mm x 17.2mm x 11.5mmInclude:Band, Dock, Cable and Manual(SC)