This product is a new type which is focused on showing and putting valued things. It will make function when the line broken or short circuit. Whatever the thief cuts down the line or combines the lead, it will send out loud voice to frighten him and warn the master, then the things can be protected. The thief has no other ways to mooch. It's the ideal choice to protect the cell phone, laptop computer, digital products, GPS, etc.
Plug the USB cable directly into the USB port to control the goods, open the alarm switch to the "ON" position, when the thieves pulled out USB plug, the alarm host to immediately sound the alarm.