AlertGuard™ Portable Door Security Alarm

Why Solo Travelers Never Check In Without This $19.95 Door Guard

Hotel locks and key cards aren’t always enough. Set this small brace against your door, turn the knob, and the door won’t push open from the outside. You get real peace of mind in any room, anywhere you sleep.

Real peace of mind! I travel alone for work constantly, and clicking this into place gives me so much peace of mind at night.

By author Jessica S.

Last Update October 2026

Place It. Turn It. Sleep Easy.

Slide it under the door handle side, adjust the knob until it’s snug against the door, and you’re done. When someone pushes from outside, the brace digs into the floor and holds the door shut.

Your Extra Lock For Every Trip.

Hotels, Airbnbs, apartments, dorms, and rental cabins. Anywhere with an inward-opening door, AlertGuard™ adds a layer of security you control. It’s lightweight and fits in your carry-on pouch, and there’s no installation and nothing to leave behind.