The Home8 DWM1301 Door / Window contact, also called magnetic contact, is suitable for all Home8 alarm systems. Place one part of the contact on the window or the door and the other part on the frame. When a closed window or door opens when the alarm is switched on, the main panel receives a signal. The linked sirens are immediately alarmed and the connected IP cameras start to rotate immediately. Since the magnetic contact works on batteries, you can place it in any desired location.