USB Prank Device Will Make Your Office Mates Hate You

From Switched -

The USB Computer Prankster might appear to be a run-of-the-mill USB drive, but it's far more insidious. It has little switches on the side don't merely engage the Caps Lock function, keyboard, or mouse, but also make them go totally haywire.

While most netbooks have their USB ports on the side where the device will be obvious, some models and most desktops have USB ports at the rear, where it can be hidden from view, to wreck havoc on an unsuspecting user.

Available at Thumbs Up for £19.99.