ZZRUI Upgraded 2 in 1 Portable Door Stopper Floor Wedge Security Alarm Loud 120db Entrance Alert Door Stop Alarm for Travel Home Apartment House (3 Packs)
- 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..
- 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 gradually becomes smaller,it means to replace the new battery..
- PORTABLE DOOR STOPPER ALARM – package include 3 door alarms,each weight about 120g.
- ideal for bedrooms, hotels, apartments, dorm rooms, front doors, etc.
- peace of mind when traveling or working alone..