Features1APPLICATION: Used for security net for anti theft, perfect for securing your doors and window, can also use it for cabinets, drawers, and other areas. 2EASY TO INSTALL: Door alarm sensor is incredibly easy to install, and it only takes a few minutes to set up. It comes with everything you need to install it on your door or window, minimal power consumption. 3HIGH SENSITIVITY: High sensitivity door alarm, designed to be white and unobtrusive, making it easy to blend in with your surroundings, keep your family safe and secure. 4WIRELESS: Using wireless magnetic control and remote wire control anti theft, wire control distance up to kilometers, using microcomputer technology, strong anti interference ability. 5HIGH DECIBEL: Door alarm sensor comes with a 120 decibels alarm that will sound off as soon as someone tries to open your door or window. This will alert you and anyone nearby, deterring the burglar from entering.SpecificationItem Type: Door Alarm SensorMaterial: ABSBattery: 6F22, 9V, 1pcs (shipped without batteries)Package List1 x Door Alarm Sensor 1 x Screw 1 x Screw Holder