【Easy Installation】No wiring required. Just peel and stick the alarm where needed. 【Adjustable Sensitivity】High-Medium-Low sensitivity adjustable. When a window or door is opened, an alarm will sound. 120dB high-pitched continuous siren when activated. 【Product Specifications】Material: Plastic; Main Color: Black and Silver; Battery: 1 * 9V battery (not included); Siren Volume: 120db; Size: Approx. 14*4.5*3.8cm/5.5*1.8*1.5 inches; Package Weight: Approx. 123g/4.3oz. 【Compact】Mini size, space-saving, special design that can be used in homes, offices, and hotel rooms. Easy for travelers to carry. 【Versatile】Can be used as a door stopper when the power switch is turned off.