Universal function include heart rate and blood pressure monitor, sleeping time and quality monitor, alarm clock, call and message reminder, sedentary vibration reminder, step counter, distance, calories TPU Strap wristband adopts skin-friendly, soft and comfortable TPU material and is ergonomically designed Perfectly suitable for keeping track of your fitness activity Comes with ultra light and adjustable band for comfortable wearing during sports Powerful Compatibility Fits Androids 4.4 above and iOS 9.0 above devices, sensitive single-touch screen