ZZRUI Upgraded 2-in-1 Portable Door Stop Alarm - 120dB Security Alert for Home and Travel (3 Pack)

About this item

• 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.
• SIMPLE SETUP – no electrical connections required; powered by batteries (1x9V battery needed, not included); position it beneath the door, ensuring the space between the door's bottom and the floor is between 10mm (0.38 in) and 35mm (1.35 in). It should not slide on tiles when the door is opened; for smooth surfaces, you may experiment with H-type sensitivity and vibration detection alarm.
• 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.
• PORTABLE DOOR STOPPER ALARM – package include 3 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.
• 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.