I’ve been using the Rosoenvi Door Stop Alarm for months now—both at home and during solo trips—and it’s become my go-to security hack. The dual function (wedge + alarm) is genius. At hotels, I slide it under the door, flip the sensitivity to high, and sleep like a baby knowing a 120DB siren will blast if someone tries to push in.

The LOUDNESS is no joke. My partner accidentally triggered it once while testing, and we both jumped out of our skins—exactly what you’d want to scare off intruders. Pro tip: The medium setting works best for most doors; high can be *too* sensitive (learned that after a false alarm from housekeeping nudging the door).

Compact? Absolutely. I toss one in my carry-on—it’s lighter than my toiletry bag. But heads-up: It won’t work on doors with gaps smaller than 0.6 inches (my sister’s apartment door failed this test). Also, pack a spare 9V battery—it’s not included.

For $20/two-pack? Worth every penny. It’s not Fort Knox, but that ear-splitting alarm buys you precious seconds to react. Bonus: Housekeepers now knock EXTRA loud after encountering this little beast.