Safety Technology Portable Door Guard Alarm 98dB with LED Flashlight – Vibration Detection, Works Through Gloves, Travel-Ready, 20-30 Second Alert, 2 AAA Batteries

A Door Alarm That Detects the Attempt, Not Just the Entry

Standard door alarms trigger when a door swings open past a magnetic sensor. The Door Guard works differently — it reads vibration directly from the door itself. The moment someone pushes, rattles, or pries at the door, the alarm fires. That distinction matters: you get an alert while the intruder is still outside, not after they’ve crossed the threshold.

The vibration sensor is sensitive enough to detect movement through both metal and wooden doors. It even registers motion when someone is wearing gloves — a detail that makes this more reliable than contact-based sensors in real-world conditions.

Who This Door Alarm Is For

Travelers staying in hotels, Airbnbs, or short-term rentals where the door locks aren’t under their control. The Door Guard adds an independent layer of security that doesn’t depend on the building’s hardware.

College students in dorms, apartment dwellers with shared entry points, and anyone in temporary housing who wants fast, removable security without asking a landlord for permission. Hang it when you arrive, pocket it when you leave.

It also works well as a secondary alarm on side doors, garage entry doors, or any entry point that doesn’t justify a full wired system. Straightforward supplemental coverage for one specific door.

How the Door Guard Actually Works

Hang the unit from any doorknob, handle, or window latch using the built-in hook. The alarm arms immediately — no switches, no PIN codes. When vibration exceeds the detection threshold, it emits a 98dB alert. That’s roughly equivalent to a loud power tool or a motorcycle at close range — loud enough to wake a sleeping person in an adjacent room and audible to neighbors in most building types.

After 20-30 seconds, the alarm stops and resets automatically within 3-5 seconds, making it ready for the next event without any manual reset required. The built-in LED flashlight operates independently from the alarm function — useful for checking dark hallways or entryways without waking others or hunting for a separate flashlight.

The device weighs 0.15 lbs and measures 4″ x 2″ x 1¾”. It fits easily into a jacket pocket, toiletry bag, or carry-on. Two AAA batteries power both the alarm and flashlight, and the battery compartment is accessible without tools.

Practical Details

The Door Guard measures 4″ x 2″ x 1¾” and weighs 0.15 lbs. It runs on 2 AAA batteries (included or standard household). No installation required — hang it on any doorknob, handle, or window latch. Alarm output is 98dB. Alert cycle is 20-30 seconds, with a 3-5 second auto-reset. Backed by a 1-year warranty from Safety Technology.

Effective door security doesn’t require a permit or a lease clause — the Door Guard is ready the moment you hang it.

Frequently Asked Questions