Features: Suitable Smartphone System: For Android 4.4/iOS 8.0 and above. OLED Touch Screen: Adopts colorful OLED touch screen, visual sensory is bright and vivid, easy to operate. Personal Health Assistant: The latest generation of heart rate algorithm, more accurate through the green light sensor to stimulate heart rate and blood pressure monitoring data, help you to know your healthy condition better. Automatic Sleep Monitor: The daily sleep quality can be reported intuitively by connecting APP, caculate your deep sleep and shallow sleep automatically. Calls Apps Reminder: Reminds you of calls, Facebook, Twitter etc, fun and convenient. Long Standby Magnetic Charge: 100mAh large battery, combined with the latest high-tech energy-saving technology, provides about 30 days standby.