ZZRUI Door Stop Alarm with 120dB Siren, 4 Pack Portable Security Door Stopper Wedge Alarm for Travel, Home, Apartment, Dorm, Hotel, Entry Alert Safety Device for Women & Kids

DOOR STOPPER SECURITY ALARM – the door stopper alarm in “on” status,when door pressure is applied,the door alarm will be triggered at the same time as make extremely loud 120db alarm,helps wake/alert homeowner or renter, helps deter intruder and perhaps notifies neighbors,security protection.
NON-SKID DOOR STOPPER – the door stopper alarm in “off” status,it may be used as common damping rubber base door wedge,hold door in open position,no any loud alarm sound.
EASY INSTALLATION – no wiring needed; battery-operated (requires 1x9V battery,not included);place it under the door,the gap bewteen the bottom of the door and the floor must be 10mm(0.38 in) to 35mm(1.35 in),it can not slide on tile when door opens,smooth floor can try to use H-type sensitivity,vibration-sensing alarm.
3 SENSITIVITY LEVELS – Low – Medium – High,with an adjustable sensitivity switch on the side;H level is the most sensitive level that vibration will trigger an alarm;please note when the alarm sound progressively becomes smaller,it means to replace the new battery.
PORTABLE DOOR STOPPER ALARM – package include 4 pack door alarms,each and every weight about 120g;easy to carry;alarm loud 120db to give protection to you;great for commute;ideal for bedrooms, hotels, apartments, dorm rooms, front doors, and the like;peace of mind when traveling or working by myself.