An ingenious and effective way to deter intruders， this alarm sounds when the door is pushed open to signal unwelcome entry.Great for home， office， and travel.The small size is perfect for throwing in your travel bag， briefcase， or purse.Features stainless steel cover， 3 sensitivity levels and extra-loud alarm.Requires one 9-volt battery (not included).Measures 13cmx4cmx3cmFeatures:Stainless Steel Cover3 Sensitivity LevelsExtra-Loud AlarmRequires One 9-Volt Battery (not included)Package inclued: 1x door stop alarm