Description:Heart rate monitoring and sleep tracking: heart rate monitoring helps you understand your heart status during workouts.Also tracks your sleep automatically, helping you to measure awake, light, and deep sleep periodsActivity tracking with 9 sports modes, track your daily activity data like steps, calories, distanceand minutes active and generate data charts on your device.You can also use the built-in multi Sports modes to see real-time exercise statsWith a 210mAh large battery, Just 2 to 3 hours charging enables more than 10 days usageMultifunctional smart watch, sedentary reminders, relaxation training, call/message reminders,reject call functionality, alarms, music control, customized watch dials, Stopwatch settingsand you can even store up to 10 messages this device has it all, it?s also IP68 water resistantCompatible with smartphones that use IOS 8.0/Android OS 4.4 or later, and Bluetooth 4.0 or later.Specification:Material: Metal, glass, TPUColor: Black, Green, PinkStrap length: About 250mmScreen: About 1.3inchScreen: 2.5D High strength tempered glassWaterproof rate: ip68Battery capacity: 210mah(built in)Working voltage: 3.8VWaterproof rate: ip68Charging time: 2.5 hoursWorking time: 10 daysWorking temperature: -10?- 40?Package includes:1pc x Smart watch1pc x Charging cable1pc x User manualNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 1-2 cm differences due to manual measurement.