Cateye Strada Smart With Speed & Cadence Sensor: The Strada Smart employs the technology held in your smart phone & neatly displays it in a compact head unit on your bars! Utilising one of the most powerful cycle computers Simply download the free Cateye Cycling App to your phone, then set up the Bluetooth Mirroring to the Strada Smart head unit & usng your phones technology data will be displayed on your screen including; speed data, mileage data, time data & altitude data (in mirroring mode), while the ride data is recorded on your phone for use later. Phone & messaging icons will appear on your bars too, useful if youre expecting a call or text. Use the head unit without the phone, by upgrading with optional Bluetooth Speed/ Cadence & Heart Rate senors, or sync the sensors (including Bluetooth Power Sensors) directly with your phone to record the data for your training records. Strada family standard functions i OS & Android Compatible (iPhone 4S or up, Android 4.3) Customizable Display Clicktec button interface Mirroring or Sensor Direct Modes Super easy direct upload to Cateye Atlas TM, Strava TM & Training Peaks TM. Fit to stem or Handlebars with Flextight bracket Electronic manual viewed on smartphone Cateye Cycling App available on App store & Google Play.