Specifications:  Applicable Model: Support IOS, Android 4.3.  Bluetooth: V4.0.  OTA upgrading: easy error repair and function expanding.  Battery: 40 mAh Polymer battery.  Work time: >192 hours.  Waterproofing grade: IP65 Water resistant.  Working temperature: -20 °C ~ +45 °C.  Storage temperature: -40 °C ~ +45 °C.  USB plug times: >2000 times.  Key: >10000 times.  Band buckle: >4000 times.  Input current: 0.15A.  Output voltage: 5.7V.     Description:  Screen: 0.91inch OLED,natural interactive mode.  Button: Touch Key-press.  Material: TPU.  Charging: Standard USB.  Product Dimension: 50mm x 16.5mm x 10mm.  Color: Black, Pink, Grey, Orange, Green, Blue.     Functions:  Call reminder: Call reminder, it will avoid missing any important call.  The Anti loss Function: when the smart band and mobile phone are apart for a certain distance, the band will be vibration to remind.  Time display: Time can be synchronized with computer,mobile phone, ipad time.  Long time sitting reminder: It will vibrate you to remind you exercising when you sit long time non movement.  USB charge: Design to charge by USB without charger whenever and wherever.  Pedometer/calories consumption calculating: Be able to track the steps, the movement distance and calories consumption:Check the completed situation of your target.  Waterproof life: IP65 waterproof, can wear it when wash hands or in the little rain outdoor,but do not take it to swimming,take shower or put it into water for too long time.     Features:  With OLED display,monitor the step count,calories,sleep situation and clock at any time.  Smart band with USB interface,connect computer and power bank directly.  IP65 protection level: Life waterproof,you can use it while washing hands, but do not take it to swimming or put it in water for long time.  All-day Activity Tracking + Sleep Monitoring + Silent Alarms.  Stylish and healthy,weight is 23g only,wireless syncing automatically to smartphones.     Note:  If you want to download the Android app and IOS app,you can scan the two-dimensional code in the bottom of the page.     Package includes:  1 x smart wristband.  1 x user manual.  1 x charge wire