Bluetooth Sync Sports Bracelet Fully Touch Screen OLED Monitor Fitness Tracker Water Resistant Sleep Monitoring Anti-lost Watch for Smartphones for IOS Andriod All day tracking: step counting, distance tracking, calorie tracker; Sleep monitor: sleeping time, sleeping quality, alarm clock and etc; Incoming call notice, remote camera, remote video, find phone, lost warning, out of range alarm The product size: 1.5'' X 0.6'' X 0.4'' (L*W*H). Watchband size: 5.5'' X 7.7'' (L*W). Fully touch screen function.Main material: TPU. Weight: 8g. Totally 132g with a packing box. Fitness goal: Fitness goal setting, synchronous data to mobile applications; Share the information on APK with your friends on Facebook The product would calculate the data when your arms or legs move even though you did not walk or do sports; Please keep the APP open so that it can sync with the bracelet; Please scroll down the Home page on APP when you want to sync the data; The charging slot is on the device, please take off the bracelet when charging it, please distinguish front and back side, or it won't be charged.