ZZRUI Upgraded Door Stopper Security Alarm,Portable 120 Loud Entrance Alert Door Stop Alarm for Travel Home Apartment House(2 Pack)

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  • 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 should 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.
  • PORTABLE DOOR STOP ALARM package include 2 pack door alarms,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.

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