Product Description / Features:Wireless computer with 8 functions: Current speed Average speed Trip distance Settable odo meter Clock Low battery indicator Auto scan Auto start / stop Slim computer with easy to read full-sized display. High-resolution 3 line LCD. Easy operation by a single button. Sophisticated auto start / stop function with sleep mode after 48 hours to save battery power. Computers can be mounted on handlebars and stems. Waterproof casing. Wheel magnet fits round and aero spokes. Battery included.