2-in-1 Personal Alarm and Door Burglar Alarm 120dB – Doorknob Triggered Security Alert, Pull-Chain Personal Panic Alarm, 4.25 x 2.25 x 1 Inch, Requires 9V Battery, Wearable or Mountable

SKU: AL-2
Categories: ,

$10.95

Buy with Confidence
Covered by a 30-Day Money Back Guarantee. If it's not right for you, returns are easy and hassle-free.

Secure Checkout - Satisfaction Guaranteed - Money Back Guarantee

Secure checkout • 100% Satisfaction Guaranteed • 30 Day Money Back Guarantee • Easy Returns • Fast Customer Support

One little alarm that does two jobs. Hang it on a doorknob and it goes off the second someone touches it. Pull the chain and it works as a personal alarm you carry with you. At 120 decibels, it's loud enough that nobody nearby is going to ignore it.

  • 120dB alarm – loud enough to startle anyone and draw attention from a distance
  • Door mode – hang on any non-metallic doorknob and it triggers automatically on contact
  • Personal alarm mode – pull the metal chain to sound the alarm when you're out and about
  • Compact size – 4¼" x 2¼" x 1", light enough to toss in a bag or clip on
  • Simple power – runs on one 9V battery (not included)

Two Alarms for the Price of One

Most alarms do one thing. This one does two. At home, it acts like a basic burglar alarm — hang it on a doorknob, and if anyone touches that knob, it fires off a 120-decibel siren. When you head out, take it with you, give the chain a pull, and it becomes a personal alarm. Simple idea, solid execution.

It’s the kind of thing that makes sense for a dorm room, a hotel stay, or just someone who wants a little extra notice if someone’s messing with a door they shouldn’t be.

Who This Personal Alarm Is For

College students are probably the biggest fit here. You can use it on your dorm room door at night and carry it to class during the day. One product, both situations covered.

It also works well for people traveling and staying in hotels or short-term rentals — just hang it on the door before you go to sleep. No installation, no tools, nothing to figure out.

And anyone who wants a basic personal alarm but also gets some value from the door function — this gives you both without having to buy two separate things.

Is This the Right Choice for You?

Choose this alarm if you want:

  • A doorknob alarm that requires zero installation
  • Something that doubles as a personal alarm you can carry
  • A simple, inexpensive solution for hotel rooms or dorms
  • A loud 120dB alert that works automatically on door contact

Consider something else if you need:

  • A door alarm with adjustable sensitivity or delay settings
  • Something that works on metal doors (doorknob trigger won’t work)
  • A dedicated personal alarm with a wrist strap or clip for daily carry

How It Actually Works

The door function is straightforward — hang the pull-chain loop over any non-metallic doorknob. The alarm sits against the door. If someone turns or touches the knob, the chain pulls and the siren sounds. You don’t have to set anything or flip any switches. It’s automatic.

For personal use, you just carry it in your hand or bag with the chain accessible. If you need to set it off, pull the chain. The 120-decibel siren is genuinely loud — that’s about as loud as a chainsaw at close range. More than enough to draw attention and give you a moment to react.

The whole unit weighs under a quarter pound and is small enough to fit in a jacket pocket. There’s nothing complicated to learn. It either works as a door alarm or a personal alarm depending on what you need that day.

Quick Comparison: How Does the 2-in-1 Alarm Stack Up?

Feature 2-in-1 Door/Personal Alarm Dedicated Door Alarm Dedicated Personal Alarm Pepper Spray
Door Security ✓ Yes ✓ Yes No No
Portable/Carry ✓ Yes No ✓ Yes ✓ Yes
Sound Level 120dB 120dB 130dB typical None
No Installation ✓ Yes ✓ Yes ✓ Yes ✓ Yes
Physical Effect on Attacker No No No ✓ Yes
Best For Travel, dorms, dual-use Home doors Daily carry Active defense

Practical Details

Size is 4¼” x 2¼” x 1″ — fits in a coat pocket no problem. Weighs 0.23 lbs. Runs on one 9V battery (not included). Works on non-metallic doors only for the doorknob trigger function. Color is black. Pull chain included.

Worth picking up a two-pack — keep one by the door at home and toss the other in your travel bag. At this price, it’s an easy call.

Frequently Asked Questions

Does it work on metal doorknobs?

The doorknob trigger function is designed for non-metallic doors. Metal doors can interfere with how the alarm activates. If you have a metal door, you’d be better off with a door alarm that uses a different trigger mechanism — like a door stop alarm or a contact sensor. The personal alarm function works fine regardless of door material.

How loud is 120 decibels, really?

It’s loud enough to be uncomfortable to stand next to. Think along the lines of a smoke alarm going off right next to your ear, or standing close to a running chainsaw. In a hallway or hotel corridor, it carries a long way. It’s definitely going to get attention from anyone in the area.

Can I use it in a hotel room?

Yes, that’s actually one of the most common uses for this type of alarm. Hang it on the door handle before you go to sleep. If anyone tries to open the door from outside, the chain pulls and the alarm sounds. No installation, no damage to the room, and you take it with you when you check out.

Does it come with a battery?

No, the 9V battery is not included. Pick one up before you need it — you’ll want it ready to go right out of the box. A standard 9V from any grocery or hardware store works fine.

Decibles120 db
BatteryOne 9 Volt
ColorBlack
IncludedPull Chain
Weight0.23 lbs
Dimensions4 ¼" x 2 ¼" x 1"

Additional information

Related products