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2-in-1 Personal and Door Burglar Alarm 120dB — Hang on Doorknob for Intrusion Alert, Pull Chain for Personal Safety, Battery Operated, Portable Travel Security

SKU: AL-2
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Original price was: $10.95.Current price is: $9.31.

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You don't get warning when trouble shows up — but this little device gives you one. Hang it on a doorknob and it sounds off at 120 decibels when someone touches the handle. Carry it with you and pull the chain to use it as a personal alarm. Two tools in one, small enough to fit in your pocket.

  • Dual function — works as a door burglar alarm and a personal safety alarm
  • 120dB alarm is loud enough to alert neighbors and scare off intruders
  • Door mode activates automatically when someone touches the doorknob
  • Pull-chain activation for personal alarm use — simple even under stress
  • Compact and portable at 4.25 x 2.25 x 1 inch, weighs just 0.23 lbs, runs on one 9V battery

Two Jobs, One Simple Device

From what I’ve seen in decades of security work, the best tools are the ones that don’t need a manual. This 2-in-1 alarm does two things, and both of them are dead simple. Hang it on a doorknob — it becomes a burglar alarm. Carry it with you — pull the chain and it becomes a personal alarm. No setup, no apps, no Wi-Fi. Just a 120dB siren that tells everyone within earshot that something is wrong.

Who This Alarm Is For

Travelers who stay in hotels, motels, or Airbnbs where you can’t trust the locks. College students in dorm rooms. Anyone in an apartment who wants an extra layer of security on their front door without installing hardware.

It’s also a solid personal alarm for anyone who walks alone — the pull-chain design works even if your hands are shaking, which they will be if you’re actually in trouble.

Is This the Right Choice for You?

Choose this 2-in-1 alarm if you want:

  • Both door security and personal alarm in one portable device
  • Simple doorknob-hang activation with no installation required
  • A travel-friendly alarm that works in any hotel or rental

Consider something else if you need:

  • Door alarm for metal doors — this works on non-metallic doors only
  • Louder output — 130dB models are available for more volume

How It Keeps You Safe in Two Different Ways

In door alarm mode, you simply hang the unit on any non-metallic doorknob. The sensor detects when someone touches or turns the handle, and immediately fires the 120dB siren. No magnetic strips to align, no adhesive to stick — just hang it and walk away. The alarm is loud enough to wake you, alert people nearby, and make most intruders rethink their plan fast.

In personal alarm mode, you carry it with you. If you feel threatened, pull the metal chain to activate the siren. That 120 decibels draws attention from everyone around you, which is exactly what you want — witnesses and help. It’s the kind of simple activation that works under stress, when fine motor skills go out the window.

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

Feature 2-in-1 Personal/Door Alarm Door Stop Alarm Keychain Personal Alarm Window Alarm
Personal Alarm Yes ✔ No Yes ✔ No
Door Protection Yes ✔ Yes — blocks door ✔ No No
Volume 120dB 120dB 120-130dB ✔ 90-110dB
Installation Hang on knob ✔ Place on floor ✔ N/A Adhesive mount
Portable Yes ✔ Yes ✔ Yes ✔ No
Best For Travel + personal safety Hotel room security Walking alone Home windows

Practical Details

Measures 4.25 x 2.25 x 1 inch and weighs 0.23 lbs. Black housing. Requires one 9-volt battery (not included). Includes pull chain for personal alarm activation. No installation needed for door alarm mode — hangs on any non-metallic doorknob.

Simple and reliable matters. One device, two ways to protect yourself — at home or on the go. Take care of yourself and the people who count on you.

Frequently Asked Questions

Why doesn’t it work on metal doors?

The sensor is designed to detect the electrostatic charge created when someone touches a non-metallic doorknob. Metal doors and knobs conduct that charge differently, which can prevent the sensor from triggering properly. For metal doors, a door stop alarm or a door wedge alarm would be a better choice.

How loud is 120 decibels?

120 decibels is roughly as loud as a rock concert or a thunderclap. It’s well above the threshold of pain for most people, which is exactly the point. At that volume, it will wake you from sleep, alert people in nearby rooms or apartments, and make an intruder want to leave immediately.

Can I use this in a hotel room?

That’s one of its best uses. Many hotel room doors don’t have deadbolts you trust, and security chains can be defeated easily. Hang this on the inside doorknob before you go to sleep, and you’ll know immediately if someone tries to enter. It packs flat and weighs almost nothing for travel.

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

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