If you want to rile your coworkers, gadget shop Think Geek has the right gadget for the task. The new Phantom Keystroker connects via USB on your victim's computer and the fun can start.

This evil high-tech prank device emulates a keyboard and mouse and periodically makes random mouse movements and types out odd garbage text and phrases

A simple jumper setting allows you to choose between either keyboard garbage typing, annoying mouse movements or both. An adjustment pot sets the duration between "events".

Note, April 1st is around the corner. This USB Gadget is ideal for some April Fool's joke.

The Phantom Keystroker sells for $24.99 on Think Geek.