This door stall alarm can be adjusted with high, medium and low sensitivity, and 120 dB high-pitched continuous siren when activated. When the power switch is off, it can be used as a door stop. It is small in size and space-saving, and can be used in special designs for homes, offices, and hotel rooms without installation and is convenient for travelers to carry. Features: 【ADJUSTABLE SENSITIVITY】This door stall alarm has three levels of sensitivity, high, medium and low, which can be adjusted according to your needs to prepare for emergencies and bring you a sense of security. 【SUPER LOUD VOLUME ALARM】When this door stall alarm is activated, the 120 dB high-pitched continuous siren can effectively warn you, and it can also scare off intruders and effectively prevent theft. 【HIGH PRACTICAL VALUE】This safety alarm can be used as a siren when the power is turned on, and can be used as a door stop when the power switch is turned off. 【SMALL AND PORTABLE】This access control alarm is small in design and saves space. It can be used in special designs for homes, offices, and hotel rooms, and has a wide range of applications. Specification: Material: Plastic Main Color: Black and silver Battery: 1* 9V battery(Excluded) Siren Volume: 120db Size: Approx.14*4.5*3.8cm/5.5*1.8*1.5in Package Weight: Approx.123g/4.3oz Package List: 1 * Door Stop Alarm Note: 1. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.