Some gadgets are useful around the office. They can save you precious time and make doing your job much more efficient. This is not one of those gadgets, but that doesn’t make it any less worthy of your hard-earned money.

It’s called the Phantom Keystroker V2 and it is a prank product that is perfect for the cubicle environment. Looking not unlike a nondescript USB flash drive, this device can be plugged into any computer and will work without drivers. It will then make random mouse movements and keystrokes on an intermittent basis.

Your co-worker will think that his or her computer has either a) been infected with a malicious virus or b) been possessed by an undead receptionist bent on their doom. It’s important to note that the Phantom Keystroker will never hit the return key or click the mouse button, so it is unlikely to have seriously damaging effects.

Prank with caution, but this $12.99 toy from ThinkGeek could prove to be a lot of fun when used appropriately.