No need to install it, it is easy for travelers to carry. The wedge design is suitable for any hinged door. The 120 dB active alarm continues to activate. It can be used as a door stop when the power switch is off. Powered by a 9V battery. (not included) Mini size saves space. Specially designed for home, office, and hotel rooms. Make sure you are safe and at ease at home or on the go.
Material: ABS + stainless steel cover. Wireless. Adjustable high, medium and low sensitivity. Vibration sensor.