Everyone deserves a vacation, but relaxing is tough. Whether the kids or pets are left behind, you worry about your home! The DoorSpy will give you peace of mind. GSM technology will allow you to communicate with the device. Magnetic contacts are placed on the door/window and will send a text message to your mobile device, based on the door activity (or window). You can also call into the device and listen to everything, and because it uses GSM technology, you can do this anytime, anywhere in the world!