Product has Screen Display, Heart Rate,Sleep Monitor, Intelligent Alarm, Sports Alarm, Anti-lost functions. It is very convenient for your life. You must connect phone through Bluetooth before use. Features: Dynamic heart rate display, 24 hours of monitoring For Android 4.3 & iOS 8.0 Bluetooth 4.0 or Above smartphones. Intelligent alarm, monitor sport, sleep condition, super large OLED display, longer standby time, etc. Customizable Band APP: We can achieve sleep/sport monitoring and search for band by using CUBOT V2 APP, more functions like share your sport condition to wechat moments, update the firmware of this band. Intelligent alarm for band: When there is call, SMS, APP notification, the band will vibrate and the notification led shines. In a noisy outdoor environment, even if the phone is in your backpack, no need to worry about missing important calls. Precise motion sensing: CUBOT V2 use three-axis acceleration sensor by the world "s top chip supplier. Stable,not easy to fall off: Multiple buckle design can ensure the long-time use and no falling off. It can offer credible movement tracking record. Except the metal buckles, there are added rings to help preventing falling off. Alarm Clock Only for You: Set an alarm clock to wake you up but not to disturb your family member at the same time. Steps,Distance and Calorie are so easy to see. IP65 International Anti-water Level: It can be soaked temporarily because it achieves the IP 65 international anti-water level. So you can wear V2 when you are washing your hands or taking a shower. It can also be against the cosmetics, washing supplies and sweat corrosion.(NOT for a long time) Perfect design, convenient to take along. Note: Before you use it, you must download APP. NOT for a long time water contact resistance.