Featuring multi-sport tracking mode and sleep monitoring function, these watches are compatible with Android and iOSHighlightsSteps, calories and distance count Heart rate monitoring Sleep monitoring Anti-lost function Remote camera Sedentary alert Remote music Rectangle dial Alarm clock Charging cable included Watch menu language: English Languages supported in the app: English, Japanese, Simplified Chinese, Traditional Chinese, French, German, Russian, Romanian SpecifactionOLED screen Bluetooth version: 4.0 Waterproof rating: IP67 Compatible OS: Android 4.4 and above/iOS 9 and above Built-in 180mAh polymer lithium battery Standby time: 5-7days