Notes: <br />1. Be compatible for Android (Android 4.4 or above and Bluetooth must be 4.0 or above); for iphone (IOS 7.1 or above and Bluetooth must be 4.0 or above)<br />2. App: VeryFit for heart rate<br />3. Water Resistant:IP67; sweat proof｣ｬ rain proof｣ｬ water drop proof<br />4. The description perfectly suits for Heart Rate version｣ｬ others don't contain that function. So please be careful to choose all kinds of product including one with Heart Rate or without Heart Rate. <br /><br />How to Charge: The host should be separated from the strap when charging.<br />1.pull out the host from the strap 2. insert the metal charger into USB port<br /><br />Main Features:<br />1. Display Health Parameters<br />This smart wristband can display the time｣ｬ date｣ｬ steps｣ｬ distance ｣ｬcalories and heart rate clearly.  While paired with APP｣ｬ the bracelet can also display find phone icon and .........All these let you know your sports data immediately!<br />2. Sync Sports Data<br />When it paired your smart phone via bluetooth｣ｬ it will sync your data to Android phone and IOS phone. It gives you a real-time assessment of your exercise throughout the day.(APP: VeryFit for heart rate)<br />3. Heart Rate Monitor (only 2.0-screen with Heart Rate)<br />It can monitor your heart rate to help you do exercise and adjust your training plan scientifically.<br />4. Calls Reminder<br />When you have calls｣ｬ the smart bracelet will vibrate to remind you and display the call name or number.