Bluetooth 4.0 connectivity, stable signals and low power consumption Large color screen of 1.28 inches, with water resistance function, sweat-proof and durable for use Health monitoring: heart rate measurement, blood pressure measurement and sleep monitoring With built-in 200mAh battery, long standby time Great for sport, old people, boy, girl, suitable for most people who need to monitor health condition Specification: Model: R18T Strap material: silicone Bluetooth version: 4.0 BLE Waterproof rating: IP67 Chipset: HS6620D Acceleration sensor: SC7A20 Optical: EM7028 Display: 1.28 inch round color display Touch screen: full touch control Resolution: 240 * 240 px Battery type: polymer lithium battery Battery capacity: 200mA Charging time: about 60 minutes Working time: 5-7 days Standby time: about 30 days Material: ABS + plastic + silicon Working temperature: -20C~50C APP supported languages: English, Japanese, Korean, German, Spanish, French, Italian, Russian, Portuguese, Arabic, Chinese, Support phone system: IOS8.0 or above, Android5.0 or above Product size: 270 * 45 * 8mm Main functions: Heart rate monitoring, blood oxygen pressure monitoring, sleep monitoring, sedentary reminder, exercise pedometer/calorie consumption/recording/exercise time, Call reminder and display, message push and display, remote camera, automatic heart rate measurement, multiple exercise Measurement, clock reminder, DIY desktop picture, alarm reminder Package included: 1 x Smart Watch 1 x Charging Cable 1 x English User Manual Other things not included