If you have many untrustworthy people around you where you work, you may want to lock your PC whenever you step away from it. This prevents someone from sabotaging your work, viewing sensitive documents or playing a nasty prank on you. Still, you might forget, so the TF2000 Proximity Sensor can automatically lock your system for you, whenever you walk away.

It looks like a small square webcam on top of your screen. Using ultrasound technology, it detects your presence and acts accordingly. The software allows you to specify things like what keystrokes are triggered when you walk away, how long before they’re sent and how far away you have to be before it locks you and anyone else out.