Door Stop Alarm 120dB with Vibration Sensor – Wedge-Style Door Block, On/Off Switch, Runs on 9V Battery

A Door Wedge That Screams at Intruders Here’s the deal — this is the simplest, loudest, cheapest door security we sell. It’s a wedge. It goes under your door. If someone tries to push the door open, they’re fighting the wedge and a 120dB alarm at the same time. That’s louder than a chainsaw. It doesn’t need WiFi, it doesn’t need an app, and it costs less than lunch. For travel, dorms, apartments, or any door you want locked down at night, it’s hard to argue with this logic. Who This Door Stop Alarm Is For Solo travelers staying in hotels, motels, or Airbnbs. College students in dorms with doors that don’t feel secure. People who live alone and want extra peace of mind at night. Anyone who’s ever wished their door had a deadbolt but can’t install one. At this price, it’s also the kind of thing you buy as a gift for someone heading off to college or traveling solo for the first time. Is This the Right Choice for You? Choose the Door Stop Alarm if you want: Maximum volume — 120dB is the loudest door alarm in our lineup A physical barrier AND an alarm — it blocks the door while it screams The lowest-price door security option we carry Consider something else if you need: A doorknob-hanging design — the Portable Door Guard hangs on the knob instead of wedging under the door Window coverage — check the glass break alarms or magnetic alarms Two Layers of Defense at Once Most door alarms just make noise. This one physically blocks the door from opening. The wedge shape jams under the bottom of the door, creating friction resistance against the floor. Someone pushing from the outside has to fight the wedge, and while they’re doing that, 120 decibels of alarm is blasting through the walls. The alarm also has a vibration sensor, so if someone tries to slide it out of the way or tamper with the unit itself, it triggers. The alarm stops when pressure is released from the door stop plate, which means it resets naturally if the person backs off. On/off switch makes it easy to arm before bed and disarm in the morning. One 9-volt battery powers the whole thing — grab one at any store on the planet. Quick Comparison: How Does a Door Alarm Stack Up? Feature Door/Window Alarm Motion Sensor Security Camera Barking Dog Alarm Setup Peel and stick ✓ Mount and aim Install WiFi Plug in and aim Monthly Fees None ✓ None ✓ Often required None ✓ Detection Type Contact — door/window opens ✓ Movement in room Video motion Radar through walls ✓ Portability Travel-friendly ✓ Semi-portable Fixed install Semi-portable Best For Entry points, travel Room coverage Recording evidence Whole-house deterrent Practical Details The Door Stop Alarm measures 6⅜” x 1¾” and weighs half a pound. It runs on a single 9-volt battery and features a tamper-proof vibration sensor along with an on/off switch. It works on carpet, tile, wood, and vinyl floors — anywhere a standard wedge would work. Made by Safety Technology. Under ten bucks for a door wedge that screams at 120 decibels. Just buy it. You’ll sleep better. Frequently Asked Questions Does it work on carpet? Yes. It works on carpet, tile, wood, laminate — any hard or semi-hard floor surface. On very thick, plush carpet, the wedging effect is slightly reduced, but the alarm still works. For best results on thick carpet, make sure the unit is pressed firmly under the door. What if the gap under my door is too small? The unit is designed to fit under standard interior and exterior door gaps. If the gap is extremely tight, it may not slide in easily. Most hotel rooms, dorms, and apartment doors have enough clearance. Check the gap before you buy if you’re unsure. How long does the battery last? A standard 9-volt battery lasts a long time in standby mode since the alarm only draws power when triggered. Replace it once or twice a year for peace of mind, or keep a spare in your travel kit. They’re available at any convenience store in the world.