This feature packed fitness tracker is ideal from monitoring health and activity. Compatible system: Android4.4, IOS8.50 or above Screen: TPU + LCD Screen size: 1.3" Pixel: 240x240dpi Touch type: single touch Touch screen material: tempered glass Support blood pressure Support blood oxygenation Bluetooth: BT4.0, transmission range: about 10m Battery capacity: 170mAh Waterproof rating: IP67 Mobile App Language: English, German, Spanish,French, Italian, Russian, Portuguese, etc. Features: The app is called FitPro which is on the App Store and Google Play The watchs charger is inside the strap, pull apart the strap and there will be a USB inside which charges the watch when it is plugged into any working USB socket. No cables included 6 hours to fully charge the device, and the battery will last for 48 hours The watch has a sensor which takes blood pressure and blood oxygen level in real time Silicone straps - 20mm(W) and 219mm(L) Fits wrists 135-165mm Main functions: 1 .call reminder push 2 .SMS reminder push 3 .sports record (step, mileage, etc.) 4 .sleep monitoring 5 .calorie calculation 6.low battery reminder 7.fast charging 8.ultra low power consumption 9.heart rate 10.blood pressure 11.vibration 12.motion mode 13.remote photography