Features: Supports BT4.0, suitable for IOS 8.0 and above, or for Android 4.4 and above, easy to pair it with phone through BT connection. Supports multiple function modes,like time display, calendar mode, alarm clock, stopwatch, temperature display, altitude pressure and UV index. Supports pedometer function, including steps counting, calories consumption and distance calculation. Supportscall reminder and messages reminder(likeSMS/WeChat/QQ/Facebook/WhatsApp/Instagram, etc) for not missing any important call and information. Through the mobile phone APP, it can control your phone to take photos. The watch can store sport data up to 30 days, and you also can share your sport data to social media. Built-in button battery, and the low battery icon will appear to remind you to replace the battery timely once the battery is low voltage.