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Door Stop Alarm 120dB with Movement Sensor — Physical Door Block and Siren, On/Off Switch, Low Battery Indicator, 9-Volt Powered, Travel Security for Hotels, Dorms & Airbnbs

SKU: ST-DSAL
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Original price was: $7.95.Current price is: $6.75.

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This does two things at once — it physically blocks a door from opening and blasts a 120dB siren the moment someone tries. That combination of barrier plus alarm is what makes a door stop alarm one of the most practical travel security tools you can own. The built-in movement sensor means even tampering with the device itself sets it off.

  • 120dB alarm triggers when pressure is applied to the door stop plate
  • Physical wedge blocks the door from being opened
  • Movement sensor detects tampering with the alarm itself
  • On/off switch with low battery indicator light
  • Powered by one 9-volt battery (not included)

Block the Door and Sound the Alarm — At the Same Time

Most door alarms do one thing: make noise. This one does two. The wedge design physically prevents the door from opening while the 120dB siren alerts you and everyone nearby that someone is trying to get in. That’s a meaningful difference when you’re sleeping in an unfamiliar place and the door is the only thing between you and whatever’s on the other side.

120dB is serious volume. That’s comparable to a thunderclap or a rock concert. Nobody pushes through that kind of noise without drawing attention.

Who This Door Stop Alarm Is For

Hotel travelers, college students in dorms, Airbnb guests, and anyone sleeping behind a door they didn’t install the lock on. If you’ve ever wondered whether that hotel door lock is as solid as it should be, this gives you a backup plan that doesn’t depend on the building’s hardware.

People who live alone use these at home too — on the front door, bedroom door, or any entry that faces outside. Night shift workers who sleep during the day when the world is awake and active get an extra layer of security without installing permanent hardware.

Is This the Right Choice for You?

Choose this Door Stop Alarm if you want:

  • Both a physical door block and a loud alarm in one device
  • Maximum volume at 120dB for serious alert capability
  • Tamper detection that sounds the alarm even if someone touches the device

Consider something else if you need:

  • Protection for windows or non-door entry points
  • A device that works on doors that swing outward

How It Actually Works

Slide the door stop under any inward-opening door and switch it on. When someone pushes the door, the pressure plate compresses and the 120dB siren fires immediately. The alarm continues until the pressure is released — meaning as long as someone is trying to force the door, it keeps screaming. That’s a powerful deterrent.

The built-in movement sensor adds another layer. If someone tries to slide the alarm out from under the door or kick it aside, the sensor detects the movement and triggers the siren. The on/off switch lets you arm and disarm it easily, and the low battery indicator light tells you when it’s time to replace the 9-volt battery so you’re never caught with a dead alarm.

Quick Comparison: How Does a Door Stop Alarm Stack Up?

Feature Door Stop Alarm Door Guard Alarm Magnetic Door Alarm Security Bar
Physical Barrier Yes — wedge block ✔ No No Yes — bar block ✔
Alert Volume 120dB ✔ 98dB 90dB None
Tamper Sensor Yes — movement sensor ✔ Yes — vibration No No
Portability Good — 0.5 lbs Excellent — 0.15 lbs ✔ Lightweight ✔ Bulky
Battery One 9V 2 AAA LR44 button cells None needed ✔
Best For Maximum door protection Travel vibration alert Entry monitoring Physical reinforcement

Practical Details

Measures 6 3/8″ x 1 3/4″ and weighs 0.5 lbs. On/off switch on back of device. Low battery indicator light. Powered by one 9-volt battery (not included). Works on carpet, tile, and hardwood surfaces. No installation required — just slide it under the door.

Block the door. Sound the alarm. Take care of yourself and the people who count on you.

Frequently Asked Questions

Does this work on carpeted floors?

Yes, though it works best on low-pile carpet, tile, and hardwood. On thick carpet, the wedge may not grip as firmly against the door, but the alarm still triggers from pressure. For the best results on carpet, push the wedge firmly under the door before arming it to create a snug fit.

Will the alarm keep going as long as someone pushes the door?

Yes. The siren sounds as long as pressure is on the stop plate. When the pressure is released, the alarm stops. This means a persistent intruder will face continuous 120dB noise the entire time they’re trying to force the door. That’s enough to alert the entire floor of a hotel.

Does this only work on doors that open inward?

Yes. The wedge design requires an inward-opening door to function as both a barrier and an alarm. Most hotel rooms, apartments, and bedrooms have inward-opening doors. For outward-opening doors, a hanging door guard alarm would be the better option.

Why is the 9-volt battery not included?

The 9-volt battery is excluded to prevent discharge during shipping and storage. They’re available at any grocery store, pharmacy, or hardware store for a couple of dollars. One battery provides months of standby use since it only draws power when the alarm is actively sounding.

ManufacturerSafety Technology
Decibles120 db
BatteryOne 9 Volt
Weight0.5 lbs
Dimensions6 3/8" x 1 ¾”

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