Blackburn Atom SL 4.0 Bike Computer

Same basic functionality as Blackburn''s Atom SL 3.0 just the hard metrics of speed, distance and time but with a wireless speed sensor that works off the rear wheel, so you won't have to give up your data feed during those indoor trainer workouts. Rear wheel digital wireless speed sensor, trainer compatible Giant, 18mm tall display Comprehensive ride data: Current, average and max speed with pace arrow, mph or kmh Trip distanceodometer Ride timer, 1224hr clock, auto scan Super thin and lightweight 56mm L x 40mm W x 15.2mm H 43g Mounts to handlebar or stem