The Cateye Velo 7 Wired Computeris clear and easy to read display when you are riding along on your bike. The wired cycle computer has an auto on/off, easy, one-button operation. The computer can be mounted on the stem or the handlebar of your bike using a mounting bracket which comes with your computer. It is easy to setup and install your Cateye wired computer (especially if you've previously used an older Cateye model - if not, don't worry!) You can download a ?Cateye user manual from the Cateye site so that you're not clogged up with a paper back manual, and also,when you need to reset to a different tyre size or change battery, you will simply be able to search through the downloadable menu and find what you're looking for in seconds! TheCateye Velo 7 Wired Computeris brilliant value for a computer that is low in pirce but has all the essential functions you will need. Cateye Velo 7 Wired Computer Features Current speed/Average speed/Maximum speed Elapsed time Trip distance Total distance Clock Pace arrow Auto power saving Auto start/stop The newly designed Velo 7 is Cateye's entry level 7 function computer The larger screen is even easier to read and set up is made simple with pre-programmed tyre sizes Along with current, average and max speed measurement, track your trip distance, elapsed time and odometer Tire size: 16"/ 18"/ 20"/ 22"/ 24"/ 26"/ 700C or 100cm?299cm (default: 26") Battery: Lithium battery CR2032X1 Battery life: approx 3 years (1hr use per day, may vary depending on environment.? Dimension: 55.5?37.5?18.5mm Weight: 28 grams