Now when I first saw this USB Notebook Crime Prevention Sensor I thought it must radiate a crime-proof shield +5 or something, but alas no. It’s just a removement sensitive dongle to plug into your laptop. If the sensor gets unplugged it starts squeaking, loudly. So I guess people have to steal your laptop with this plugged in then … I’ve got no idea. US$26
Thanko USB Notebook Crime Prevention Sensor will protect your computer when left alone. Just plug the sensor crime prevention into your computer USB port. If anyone tried to take it out, the alarm will alert everyone around.