Safety Technology Door Stop Alarm – 120dB Siren with Tamper-Resistant Movement Sensor, Physical Door Block, 6-3/8″ x 1-3/4″, On/Off Switch, Low Battery Indicator, Uses 9V Battery, Travel Security

A Locked Door Isn’t Always Enough

Hotel room locks can be bypassed. Dorm doors don’t always lock from the inside the way you’d expect. Airbnb listings may have keys floating around from previous guests. If you’ve ever propped a chair under a door handle because the lock didn’t feel like enough, you already understand the problem this product solves.

The door stop alarm is a portable, battery-operated device that sits at the base of any inward-opening door. It creates a physical wedge and an audible deterrent in one unit — no installation, no wiring, no tools.

Who This Door Stop Alarm Is For

Solo travelers who stay in hotels, motels, and short-term rentals where you can’t verify who else has a key. College students in dorms with shared hallways and questionable lock quality. Anyone in a ground-floor apartment who wants an added alert on a vulnerable entry point.

It’s also practical for people who live alone and want an early warning system on a bedroom or bathroom door while they sleep — particularly if the main entry has already been secured with a separate system.

Two Layers of Security in One Small Device

The first layer is physical. The wedge shape of the alarm sits at the base of the door, creating friction that resists the door being pushed open. It works the same way a traditional rubber door stop does — pressure from the door pushes down on the wedge, which pushes back against the floor.

The second layer is the alarm. When pressure hits the door stop plate, a 120dB siren sounds — that’s roughly equivalent to a chainsaw or an ambulance siren at close range. It’s loud enough to wake you up, alert neighbors, and make an intruder reconsider. The alarm stops when the pressure is released.

The movement sensor is the detail most people overlook. If someone tries to reach under the door or use a tool to slide the stop out of position, the sensor detects the movement and triggers the alarm. It’s a small feature that closes an obvious gap.

Practical Details

Dimensions: 6-3/8″ x 1-3/4″. Weight: 0.5 lbs. Powered by one 9-volt battery (not included). Features an on/off switch on the back and a low battery indicator light so you’re not caught off guard. Made by Safety Technology. Fits easily in a suitcase, backpack, laptop bag, or large purse. Works on any hard floor surface — carpet may reduce the wedge effectiveness depending on pile thickness.

If you travel, live alone, or just want to know the moment someone opens a door, this is a straightforward tool that works right out of the box — set it down and it’s armed.

Frequently Asked Questions