ThreeH 4 Pack Door Stop Alarm 120dB Loud Portable Wedge Entrance Alert Anti-Theft Burglar Safety Tools for Home Security Apartment House Travel - H-HG19-4

• [Dual Function]: Can be used as a door stop alarm and door stopper,If someone attempts to open the door, this product will prevent it from opening and activate a 120 dB alarm. Also you can use it as common door stoppers when turn off the ON/OFF switch, Its high damping rubber bearing can prevent the door sliding and prevent the bad guys into. 120dB Security Alarm: Alarm will be triggered when someone open door, 120dB high-pitched continuous siren will be a great deterrence for any thieves or intruders. Easy Installation: 1) Put one 9V battery. 2) Select sensitivity level: M(meddle), L(Low),H(High). 3) Turn ON alarm. 4) Insert alarm under door.The gap bewteen the bottom of the door and the floor should be 10mm(0.38 in) to 35mm(1.35 in) 3 Levels Sensitivities: With an adjustable sensitivity switch on the side, 3 levels sensitivities are optional, M(meddle), L(Low), H(High). Wide Applications:Easy to carry,Size 5.3 * 1.8 * 1.4inch(13.5 * 4.5 * 3.5cm) Net weight 4.2oz(120g).Great for travel.ideal for bedrooms, hotels, apartments, dorm rooms, front doors, etc.peace of mind when traveling or working alone., Manufacturer: ThreeH