As the first kind of intelligent recreation ornament wristband it is a best gift for your friends lover families; You can use it to record daily steps burn calories walking distance exercise time; Moreover you can connect it to the mobile phone via BLE and it is suitable for you to keep healthy social contact looking after elders etc. Features: 1 .Touch buttons easy to operate; 2 .Waterproof design suitable for a variety of scenarios; 3. Comfortable to wear; 4. Low power consumption design; 5. Supports bluetooth V4.0 wireless data synchronization; 6. Fun applications; 7. Display type: OLED screen display; 8. Size (inner diameter): 150~190mm; 9. Data storage time :15 days 10. Battery working time: 4~5 days 11. Battery type: rechargeable lithium-ion polymer battery 12. Wireless protocol: bluetooth 4.0 LE 13. APP: supports iOS (iPhone 4S 5C 5S) / Android 4.3 (supports mobile phones with Bluetooth V4.0) 14. Operating temperature: 0~50'C 15. Storage temperature: -20~70'C 16. Atmospheric pressure: 86kPa~106kPa 17. Hermetic waterproof (not suitable for diving deeper than 1 meter); For iPhone pls download appliances from Apple App Store; Supports iPhone 4S 5 5C 5S; For Android cellphones pls download appliances from Google Play Market; Supports Android cellphones with systems above Android 4.3 and bluetooth V4.0.