Main Function: 24H-continuous heart rate/pedometer/distance/calories/sleep monitor/sedentary remind/smart photograph/search handset/time/color screen display/incoming call remind/message remind/whatsapp remind/facebook remind, etc. Key specifications: Bluetooth 4.1. Supports IOS 8.4 or above (Smart phone only, not for PC or Tablet).It's also a great way to expand your brand.Welcome to your inquiry!