Combining the power of your smartphone with the clarity of a cycling computer, the Cateye Smart CC Computer connects to your smartphone with the Cateye cycling app via Bluetooth for accurately recorded ride data mile after mile. After your rides you can easily upload your data from the app to training sites so you can compare with others, and clearly view ways to enhance your rides.Features:Bluetooth enablediOS and Android Compatible (iPhone 4S or up, Android 4.3)Customizable DisplayMirroring or Sensor Direct ModesSuper easy direct upload to CateyeAtlas, Strava and Training PeaksCateye Cycling App available on App store and Google PlayMTB and Road compatibleCR2032 battery