Wristwatch function1. Support Bluetooth 4.0, Android 4.4 +, IOS 8.4 +2. Touch the screen to control the wristwatch3. Steps,calorie,distance : When exercising, it can record the number of steps, the calories burned, running trajectory and the distance to the destination.4. Heart rate monitor : It will accurately monitor and record your heart rate.5. Blood pressure monitor : It will accurately monitor and record your blood pressure.6. Sleep monitor : When sleeping, it can monitor the time and quality of sleep.7. Sedentary reminder : Set the sedentary reminder time, it will vibrate to remind you to rest.8. Alarm clock9. Weather forecast10. Music Play Control11. Remote control photography : Within 10 meters, you can shake it to control the phone to take pictures.12. Message and call reminder : When the phone receives a call or a message, it will vibrate to remind you.13. 10 days standby time. Wristwatch dial:Wristwatch movement type : SmartWristwatch battery : 170 mAhWristwatch dial shap e : RectangleWristwatch display type : LEDWristwatch case material : AlloyWristwatch dial window material : GlassWristwatch dial color : Black WatchbandWatchband material : Silicone/Stainless SteelWatchband clasp type : BuckleWatchband color : Black / white / pink Size and weightWristwatch length : Approx 25 CMWristwatch dial diameter : Approx 4.1 CM X 3.4 CMWristwatch dial thickness : Approx 1 CMWatchband width : Approx 2 CMWristwatch weight : Approx 31 G PackageWristwatch X 1charging cable, X 1manual, X 1packaging box, X 1 Waterproof specification:You can wash hands and face with wearing it.But it doesn't support bathing, swimming, diving.notes:Wearable devices monitor human activities through electronic sensors, which belong to the consumer electronics level. It is normal to have certain deviations, and users should treat the data objectively.--Please don't compare reading to hospital equipment, it's not medical equipment!--Before use, please scan the QR code on the manual to download the APP and connect the watch through the APP.--For Android users: Always authorize the app to access all phone features and keep it running. And please turn on GPS on your phone before connecting.​ -- Please charge for 2-3 hours after receipt. After a long delivery, it was out of power. Thanks!Which phones are compatible with the watch?Compatible with Samsung, Xiaomi, Apple, Huawei and other Android and IOS mobile phones.Are the batteries durable?The general waiting time is 3-5 days, and the use time is 1-2 days. a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a