How Loud Is a SimpliSafe Siren and Can You Add More?

On this page (7 sections)

1. How loud is a SimpliSafe siren?
2. Who should buy the SimpliSafe Auxiliary Siren?
3. Where should you put an extra SimpliSafe siren?
4. Which SimpliSafe system should you pair with an auxiliary siren?
5. How do you set up and care for a SimpliSafe Auxiliary Siren?
6. What mistakes should you avoid when adding a siren?
7. Should you add a SimpliSafe Auxiliary Siren?

A SimpliSafe siren can come from the Base Station or a separate Auxiliary Siren. The Base Station is rated at 95 dB, and the compatible Gen 3 Auxiliary Siren is rated at 105 dB.

Add the auxiliary unit when you want an audible alert in another location.

That extra sounder suits a home with a distant room, basement, or sheltered outdoor entry that the Base Station may not cover as well. It won't make every room equally loud, and it only works with a compatible Gen 3 system.

How loud is a SimpliSafe siren?

The Base Stations in the 8-piece and 5-piece SimpliSafe systems are rated at 95 dB; the Auxiliary Siren is rated at 105 dB. That higher rating gives you a louder additional sounder, but it can't predict what you'll hear throughout your home.

Walls, closed doors, distance, and room shape change how sound travels. Household noise can also mask an alarm, so think about where people sleep and spend time when choosing a location.

The Base Station is the system's main hub, with its own siren. For a comparison of siren options from several brands, see our guide to the best alarm sirens for home security.

Will a 105 dB SimpliSafe siren reach every room?

No. The 105 dB rating doesn't guarantee audibility throughout a house.

Sound loses strength with distance and barriers, and a siren tucked behind a closed door may be harder to hear than one placed in an open central area.

Treat an Auxiliary Siren as another alert point, not a substitute for suitable sensor placement or a plan for responding to an alarm. If you need to understand how a hub contributes to an alarm system, read what the Ring Alarm Base Station does.

Who should buy the SimpliSafe Auxiliary Siren?

Buy the Auxiliary Siren if you have a compatible Gen 3 system and a clear location where another audible alert would help. Its battery power and mounting choices make it useful where you don't want to run a power cable.

This siren fits a household that wants sound in a distant room or a sheltered outdoor area near an entry. Its weather-resistant design supports sheltered outdoor installation, but it isn't a reason to expose the unit directly to rain or other weather.

Skip it if you don't have a Gen 3 system, don't need another sound location, or expect one extra siren to solve every coverage problem. A small, open home may already have adequate audible coverage from the Base Station, depending on its placement and the rooms you use.

Before buying, identify the area where you want a second alert. If no specific gap comes to mind, review your sensors and alarm settings first.

Where should you put an extra SimpliSafe siren?

Place an extra siren where its sound can reach the area you want covered, such as a distant room or finished basement. A position with fewer closed doors and less furniture around it may let sound carry more freely.

Consider the home's layout, not only the distance from the Base Station. A central spot may help sound reach several rooms, while a siren near an entry can make an alert easier to hear in that part of the home.

For sheltered outdoor use, choose a protected location. Keep the unit away from direct exposure to weather, and follow the app's setup steps for the system.

Should the siren go near the keypad?

A siren and keypad do different jobs, so they don't need to sit together. The keypad lets you arm and disarm the system; an Auxiliary Siren gives you another place to hear an alarm.

Choose a keypad position you can reach easily, then choose the siren position for sound coverage. Our guide to the SimpliSafe keypad or key fob explains which control may suit your routine.

Which SimpliSafe system should you pair with an auxiliary siren?

Choose a system bundle based on the sensors and controls you need; the Auxiliary Siren is compatible with the Gen 3 home security system. The 8-piece bundle starts with more entry sensors, while the 5-piece bundle includes a key fob.

The 8-piece system includes a Base Station, keypad, 4 entry sensors, a motion sensor, and a panic button. It suits a home that needs several doors or windows covered from the start.

The 5-piece system includes a Base Station, keypad, one entry sensor, one motion sensor, and a key fob. It makes sense when you need a smaller starter set or fewer entry sensors at first.

The kits' sensor counts affect which points the system can monitor, while an extra siren changes where you can hear an alarm. Read how SimpliSafe entry sensors work and where to put a SimpliSafe motion sensor before deciding which areas need coverage.

How do you set up and care for a SimpliSafe Auxiliary Siren?

Mount the Auxiliary Siren with its adhesive backing or the included hardware, then follow the steps in the SimpliSafe App. Check your system generation before you buy, because the siren is compatible with the Gen 3 home security system.

Plan the position before you stick or screw the unit into place. Adhesive may not hold equally well on every surface, while screws leave holes if you later move the siren.

The unit uses 4 included AA batteries. SimpliSafe describes the battery life as long-lasting but doesn't give a runtime.

Check the siren periodically and replace batteries when needed. Avoid placing it somewhere you can't inspect or reach.

After setup, make sure the unit remains mounted securely and that nothing blocks its sound. If you move it, follow the app's instructions and confirm it is set up in the system at the new location.

What mistakes should you avoid when adding a siren?

The most common mistake is buying the Auxiliary Siren without checking system compatibility. Confirm that your home security system is Gen 3 before choosing this add-on.

Another mistake is treating the decibel rating as a room-by-room guarantee. A 105 dB rating describes the device, while doors, distance, walls, and background noise affect what people hear.

Place the siren where it addresses a real gap, and don't assume that adding it removes the need for effective sensors.

For outdoor placement, don't confuse weather resistance with suitability for direct exposure. Use a sheltered area and keep the unit accessible enough for periodic battery checks.

Should you add a SimpliSafe Auxiliary Siren?

Add the SimpliSafe Auxiliary Siren if you have Gen 3 equipment and can name a specific area where another audible alert would help. Choose the 8-piece system if you want more entry sensors included; choose the 5-piece system if its smaller set and key fob fit your needs.

Keep the Base Station as your only siren if its sound reaches the areas you use and you don't need another alert point. For a broader look at sounders, compare the options in our home alarm siren guide.

Frequently asked questions

How loud is a SimpliSafe siren?

The Base Stations in the SimpliSafe systems here are rated at 95 dB, while the compatible Gen 3 Auxiliary Siren is rated at 105 dB. Those are device ratings, not a promise that an alarm will sound equally loud in every room.

Distance, walls, doors, and room layout affect what you hear.

Can you add another siren to SimpliSafe?

Yes. The SimpliSafe Auxiliary Siren is compatible with the Gen 3 home security system.

Mount it with adhesive or the included hardware, then follow the setup steps in the SimpliSafe App.

Pick a location where another audible alert would help.

Can the SimpliSafe Auxiliary Siren go outside?

Yes. The Auxiliary Siren is weather-resistant for indoor use and installation in sheltered outdoor areas.

Choose a protected spot, keep it out of direct exposure to weather, and follow the app's setup steps.

Does the SimpliSafe siren need power?

The Auxiliary Siren runs on 4 included AA batteries. SimpliSafe describes them as long-lasting but doesn't give a specific runtime.

Check the unit periodically and replace batteries when needed so the siren can sound when an alarm triggers.