About this item

• There are 3 levels of sensitivity available: Low, Medium, and High, with a sensitivity switch that can be adjusted on the side. The High level will activate an alarm when vibration is detected. It is important to replace the battery when you notice the alarm sound decreasing in volume.
• EASY INSTALLATION – no wiring needed; battery-operated (requires 1x9V battery,not included),push the turn on button in the back of the door stop alarm into working status;place it under the door,the gap bewteen the bottom of the door and the floor should be 10mm(0.38 in) to 35mm(1.35 in),it can not slide on tile or smooth hardwood door when door opens,smooth floor can try to use H-type sensitivity,vibration-sensing alarm.
• PORTABLE DOOR STOPPER ALARM – package include one door alarm,each weight about 120g;easy to carry;alarm loud 120db to protect you;great for travel;ideal for bedrooms, hotels, apartments, dorm rooms, front doors, etc;peace of mind when traveling or working alone.
• NON-SKID DOOR STOPPER – the door stopper alarm in "off" status,it can be used as common damping rubber base door wedge,hold door in open position,no any loud alarm sound.
• DOOR STOPPER SECURITY ALARM – the door stopper alarm in "on" status,when door pressure is applied,the door alarm will be triggered while make extremely loud 120db alarm,helps wake/alert homeowner or renter, helps deter intruder and possibly notifies neighbors,security protection.