Features: Functions: Based on your heart rate time asleep and restlessness sleep score helps you better understand your sleep quality each night. Also track your time in light deep and REM sleep stages and get personal insights. Blood Oxygen Saturation Monitor: You can measure your blood oxygen saturation and understand your physical state with smartwatch. Ideal for high-intensity workouts and sports such as marathons and gym workouts. Large Screen: With a larger display and an always on option your informations always a quick glance away (always on display requires more frequent charging) 15-Day Battery Life: With a fully charged watch you don't need to bring a charger for a two-week trip. On a single charge it has enough power to get you charged for 2 whole weeks mind-free. Wide Applications: Suitable for various occasions clothing styles and makeup such as dating parties holidays celebrations Christmas and more. Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Wristband Size: 120-110mm Body Size: Diameter 47*12.5mm (main body) Weight: 29g Body Material: ABS WWatchband: TPU Upper Cover Material: PC Sensor: Acceleration sensor Heart Rate Detection: Manual CompatibleSystem Version: Android version 4.4 or higher; IOS version 8.4 or later Main Functions: Display time blood pressure heart rate blood oxygen monitoring meter steps calories burned sleep monitoring phone calls reminding information push music control alarm clock to remind throw remote control picture the weather forecast etc APP: Fit pro Screen Size: 1.44 inches Resolution: 128 * 128 Battery Capacity: 50 mAh Support 13 Languages: Simplified Chinese English Dutch Russian French German Portuguese Spanish Turkish polish Malaysia Czech slovak APP with mobile phone language includes: 1 * Smartwatch