About Cat Eye Micro Wireless: Check out the ultra-sleek Micro Wireless from Cat Eye! With no wires to clutter up your bike, it's a stealthy computer with 10 functions that's ready to tally your data on every ride. It's got a nice LED backlight, auto power-saving mode, pace arrow, and more. The Micro Wireless is a smart little unit that delivers all the information you crave. Plus, it can be configured for 2 different tire sizes allowing you to switch the head from bike to bike (requires second wireless sensor and fork mount; both sold separately).