Which alarm is right for you?

How loud is 125 decibels, really?

A security alarm only works if it is loud enough to startle an intruder and pull attention from inside and outside your home. Tap through the everyday sounds below to hear, on the scale, where a TremShield alarm sits.

For context, every 10 decibels is roughly a doubling of perceived loudness. A 125dB alarm is not a little louder than conversation, it is in a different category entirely, the kind of sound a person instinctively moves away from.

Compare every TremShield alarm

Five alarms, five different jobs. Tap any row for who it is best for. Prices and availability come straight from our store.

Where each alarm goes

Most homes are not protected by one device, they are protected by a few simple layers at the points an intruder actually tests. Tap a part of the home to see what fits.

The complete guide to choosing a home security alarm

If you have landed here, you probably want one honest answer: which alarm should I actually buy? The truth is that the best setup is rarely a single device. It is a small, calm set of alarms placed where they matter, each doing one job well. This guide walks through the five types, how to choose between them, and where to put them, without fear tactics and without a subscription.

Why an alarm you own beats one you rent

Most "smart" security systems are really a monthly bill in disguise. They depend on Wi-Fi, an app, a charged phone, and a server in someone else's building. When the internet drops or the company changes its pricing, your security changes with it. A self-contained alarm has none of those dependencies. It runs on a battery, it lives where you put it, and it is yours the day it arrives. For most people, that is not a downgrade, it is the whole point.

The five types of home alarm, in plain language

Entry (contact) alarms. Two magnetic halves, one on the door or window and one on the frame. When they separate, a siren fires. They are the simplest, most reliable way to cover several openings at once, which is why the Entry Alarm 4-Pack is where most homes start.

Vibration (glass) alarms. Instead of waiting for a window to open, a vibration alarm reacts to the shock of someone working on the glass itself, so it can sound before a break-in finishes rather than after. If a single vulnerable window keeps you up at night, the Vibration Alarm is the most direct answer.

Door-stop alarms. A wedge that physically braces a door shut and screams if anyone pushes on it. It needs no installation and fits in a bag, which makes the Door Stop Alarm a favorite for hotels, dorms, and rentals.

Personal alarms. A pull-pin keychain alarm that turns heads on the street. The Personal Safety Alarm is not about the house at all, it is about you, on a walk, a run, or a late shift.

Perimeter (motion) alarms. A weatherproof sensor watches the approach to your home and chimes indoors before anyone reaches the door. The Wireless Driveway Alarm buys you the most valuable thing in any security situation: a few seconds of warning.

How to choose: four quick questions

1. How many points are you protecting? One window leans toward a vibration alarm. A whole ground floor leans toward a multi-pack of entry alarms.

2. Do you rent or own? Renters do well with no-drill, no-damage options that move with them, which is nearly the entire range. Owners can add more permanent reinforcement alongside the alarms.

3. Are you protecting a place or a person? A home wants entry, vibration, and perimeter alarms. A person wants a personal alarm. Travelers want a door-stop alarm.

4. How much warning do you want? Contact and vibration alarms tell you the moment something happens. A driveway alarm tells you before it does.

Where to place your alarms

Burglars are not patient. They test the easy, hidden points first: a back door out of view, a ground-floor window behind a fence, a sliding patio door. Put entry alarms on every ground-floor door and the windows a person could reach without a ladder. Put a vibration alarm on the most exposed pane. If you have a driveway or a long approach, a perimeter alarm at that choke point is worth more than another alarm on the door. Upstairs windows and small bathroom openings are usually low priority.

How loud is loud enough?

A 125 decibel alarm does two jobs at once. It is physically uncomfortable to stand next to, which shortens an intruder's nerve, and it is loud enough that neighbors and passersby notice. You do not need a professional siren box on the wall. A handful of 125dB alarms at the right points create the same deterrent effect at a fraction of the cost and with none of the wiring.

Batteries, upkeep, and peace of mind

Self-contained alarms trade a monthly fee for a few minutes of maintenance a year. Most run for many months on a standard battery and chirp or dim when they are low. Pick a date you will remember, a birthday, a New Year, and test each alarm and swap any tired batteries then. That is the entire maintenance plan.

The bottom line

If you want one place to start, a multi-pack of entry alarms covers the most ground for the least money. Add a vibration alarm for a weak window, a door-stop alarm for travel, a personal alarm for the people who leave the house alone, and a driveway alarm if you want a head start. Use the finder at the top of this page to match your situation, and remember that you can always add a layer later. Security is not a single purchase, it is a calm habit you build over time.

Alarm questions, answered