Features:There's a physical button on side, convenient to use.With touch screen, USB charging.It has blood pressure monitoring and heart rate monitoring.The screen will brighten just by raising hand.Sweet reminder after long time sitting.Suitable for system Android 4.4 and above, IOS 8.0 and above. Sports recording: step counting, calorie counting, distance counting.It has sleep monitoring function and shows sleep quality tendency chart.Shake to take pictures, alarm clock reminder.Support calling, message, wechat, QQ reminder.IP 66 waterproof, no worry about rainy days. Description:Battery: Lithium Polymer Battery capacity: 60mAh Screen: 0.49 inch OLED touch screen Standby time: about 20 days Charge time: 2h Material: plastic+silicone Size: 250*20*12.8mm Package Included:1 x Smartband1 x USB Cable1 x User Manual Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Due to different personal measuring techniques, there might be 1-7cm error of the physical. Thank you