Function: health monitoring， social entertainment， tracking/alarm， meter， smart reminder， information delivery， remote autodyne， motion tracking， entertainment， sleep analysis， mobile positioningBasic parameters: Dimensions: 69.1*15.8*11.2mm Weight: 18g Material: Host Material ABS， TPU strap materialHost USB plug times: more than 1000 timesKey life: more than 10，000 timesStrap buckle: more than 2000 timesThree anti Grade: IP55Working temperature: -20 �� C ~ + 45 �� CStorage temperature: -40 �� C ~ + 45 �� C APP Language: Support Multi Languages ( English， Danish， Dutch， Finnish， French， German， Italian， Polish， Portuguese(Portugual)， Spanish(Spain)， Swedish， Russia， Chinese )Hardware Specifications:Battery: lithium polymer batteryCharging: USB charging standardDisplay Specifications: OLED screen Standby time: more than 72 hours Product Features: 1. Sport monitoring: anytime record the number of steps you walk， move distance and calorie consumption， so you real-time monitoring their movement index， based on your height， weight and other parameters accurately calculate calories burned 2. Sleep Quality Monitoring: According to your sleep quality， calculate the depth and shallow sleep time， so you have targeted to improve their living habits， 8 groups silent alarm， in the case without disturbing the family， time to wake you3. Bluetooth 4.0 low-power wireless data synchronization4. Support USB & PC side data synchronization: automatic standard USB， can be directly charged with computers， mobile power， easy to quickly add capacity， and can synchronize data and PC， support Windoos XP， Vista， Win7， Win8 system (part of the sub-official version of the Windows system there will be compatibility issues) 5. IP55 protection grade: waterproof skills with good rains， when they do not wash their hands off 6. Ultra-light weight 7. Adjustable snap strap design: the size can be adjusted according to the size of the wrist， more comfortable to wear Compacible Models: IOS: Support iPhone 4s， 5， 5s， 5c， 6， 6 plus and IOS 7.0 aboveAndroid: Support Andriod 4.3 above and Bluetooth 4.0