Shown is only the computer head. A bracket and sensor kit needs to be purchased separately. You can choose those items here on this page. The FLIGHT DECK cycle computer not only provides more information than conventional cycling computers, it features control keys integrated into both the right and left shift lever units for more convenient "hands-on-bars" operation. With no control keys on the display head, FLIGHT DECK cycle computer is able to offer an extra-large screen with easy-to read information. In addition to all the normal cycling computer functions, FLIGHT DECK cycle computer gives you a graphic gear position display, gear size display after shifting, and cadence display without the need for a crank sensor. Hands-on-bars operation Cadence display without a crank sensor Gear size display Gear positon display Four bike programing Improved weatherproofing The wireless harness kit comes with 26mm and 31.8 (O/S) handlebar clamps. Computer requires 1 Flight Deck Control button on each shift lever.