Want to buff up your home security? Just place this Door Stop Alarm under your door! It will prevent break-ins with a very high-pitched siren sound at 100dB. You can sleep with a peace of mind knowing that you and your belongings are safe. Keep out thieves with this effective yet affordable gadget! Main Features: Wedge-shape, fits under any hinged door Prevents intrusions by stopping the door Emits a very loud high-pitched siren of 100dB when someone attempts to break in Can easily wake you up, alert neighbors, and scare away burglars Durable, withstands pressure, long service life Compact and lightweight, easy to pack for traveling Made from Stainless Steel and ABS Plastic Available in Black Suitable for houses, apartments, offices, hotel rooms, etc. How to Use: Insert 3 x AAA batteries Turn it on Wedge it under the door Turn it off and it'll work like a normal doorstop Specification: Size:6.3x1.8x1.6in / 16x4.5x4cm (lwh) Weight:3.4oz / 97g