CatEye Strada Slim Wireless CC-RD310W, Cycle computer, Universal sensor

Don't be fooled by its size—CatEye's Strada Digital Wireless packs a punch. Wireless communication between the computer, speed/cadence sensor, and heart rate strap keeps your efforts dialed and your bike looking simple and clean. Other key features include auto start/stop so you get accurate ride time, plus a backlight for easy viewing during low-light rides. The Strada is a perfect tool for both racing and training and can easily be switched between bikes.