Description : New Door Stop Block Systerm Security Safety Travel House Portable Burglar Sensors Alarm 125DB This is a stainless steel cover door stop alarm, it is a effective way to deter intruders, the small size of it to save in the travel bags, briefcases, or purses. Wonderful for home, office and travel. Features : Stainless steel cover and small size. Wedge-shaped design alarm stops intruder from opening door. Adjustable sensitivity switch prevents tampering. Powered by one 9-volt battery( Not Included). Features 3 sensitivity levels and extra-loud alarm. 120 dB high-pitched continuous siren when it is activated. Easy to operate, just put it under the door. Specification : Device : Type Door Stop Alarm Features : 3 Sensitivity Levels Dimension : 14cm x 5cm x 4cm Power By : 1 x 9V Battery(Not Included) 2 x Wireless Home Travel Security System Safety Wedge Alert Door Stop Alarm