RR presents its latest range of Smart Band for all the fitness and tech enthusiasts.These watches are fashionable too, making you distinguished in the crowd. Fully compatible with various smartphones (Android and Apple's IOS system) Multi-functional Fitness Tracker: Accurately track your steps, distance, calories burnt, sleep quality and heart rate all day. With the green light detector and precision optical sensor, the heart rate monitor measure the heart rate Blood pressure at the top of the hour automatically. Use the APP to view your weekly health report with diagram and analysis of your walking distance, sleep quality, heart rate, blood pressure, blood oxygen and fatigue index. Fashionable Design and Adjustable Strap: 0.96 inch Color OLED HD Display screen with slim strap for people to wear in different situation. Record daily walking, distance and calories consumption. Sleep monitor & Alarm: Automatically track your sleep quality, and alarm silent vibration will wake you up. Support SMS, WhatsApp, Facebook, Twitter, and other social network site alert. Note: You should allow the notification of the apps in the phone and app. Bluetooth: Bluetooth 4.0 Touch Screen: Capacitive touch 0.96 inch Badn Length: 210mm, fits 4.72" - 7.87" (120mm-200mm) wrist. Battery: 90mAh Li Battery Standby Time: 160 hours Charging duration: 1-2h Sensor: Three-axls acceleration senso