The Knog Nerd 5 Function Wireless Cycle Computers are simple tool-less attachments to your bike's handlebar, frame or stem. Cased in industrial grade silicone, the Knog Nerd is 100% waterproof with no signal or function interference. The 5-function model displays current speed, trip distance, total riding time, an odometer, and a 12/24 hour clock. The animated rolling display has a push screen functionality. The Knog Nerd also has a low battery indicator. Features explained Current Speed Displays the current speed on the main display when riding.