Need more sensors?

An image of all of the components included in The Knox package.

The Knox

Equipment

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Not the right fit? Build your own system

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Monitoring

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Order now for an expected

December 20 ship date

Get your system installed by a Pro

SimpliSafe-approved technicians are available to set up your new system for you and answer any questions.
Setup starts at $124.99.

Add Pro Install

Monthly prices presented using

Prices displayed are an example of a 24-mo. payment plan. Order total must be $150+ to select Affirm at checkout.

Entry Sensor

Protects your doors and windows. Works with any door or window.

Pro Tip: Stop burglars where they break in most. Front and back doors and first floor windows. For rooms with 3 or more windows, consider a motion sensor instead.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Motion Sensor

Our most accurate Motion Sensor yet is engineered to tell the difference between people and pets. It protects an entire room from a single location with a 90º field of view and 35 ft. range.

Pro Tip: Place in a corner, 6 feet above the floor for maximum room coverage

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Key Fob

Works just like your car’s key fob. Press a button and your system’s disarmed before you enter your house.

Pro Tip: Consider getting one for anyone who might forget their PIN code.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Water Sensor

Detects leaks and potential floods, so you can stop water damage before it happens.

Pro Tip: Place it close to common household water sources. Your sinks, toilets and water heaters.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Smoke & Carbon Monoxide Detector

With 2-in-1 hazard detection, get alerted the minute dangerous levels of smoke or CO threaten your home.

Pro Tip: For extra protection, put one on each level of your home and where people sleep.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Smoke Detector

Triggers when a fire’s still smoldering—before a full fire breaks out. Loud system-wide sirens jolt you awake and out of the house.

Pro Tip: Get one for your sleeping areas. Place one in every bedroom for more security.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Panic Button

If you're at home during an intrusion, press this to trigger your alarm and alert our monitoring center.

Pro Tip: Place one in your master bedroom for easy access.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Glassbreak Sensor

Perfectly calibrated. Picks up the sound of a smashed window. Not smashed plates.

Pro Tip: A power combo when you use it with a Motion Sensor. Put it in a room with lots of windows or sliding doors.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Temperature Sensor

Triggers if your home drops below 41F, so you can stop pipes from freezing and bursting.

Pro Tip: Place it near your thermostat in vacation homes and climate-controlled rooms.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Extra 105dB Siren

About as loud as a Led Zeppelin concert in ’72. Place it inside or outside the house.

Pro Tip: Get one. It’ll scare the pants off burglars and alert neighbors to a break-in.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Outdoor Security Camera

See what’s happening outside your home, day or night, and get alerts when someone steps onto your property. This camera does not support new SimpliSafe® Active Guard Outdoor Protection.

Pro tip: Position your camera for maximum coverage. It can detect motion up to 30 feet away.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Wireless Indoor Camera

Our most advanced indoor camera — combine it with select professional monitoring plans to enable intruder intervention. Agents can see and speak to intruders to help stop crime in real time. Intruder intervention is only available with this camera.

Pro Tip: The built-in motion sensor fully covers high traffic areas.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Wired Indoor Camera

Our entry-level security camera allows you to see what’s happening at home anytime and get alerts when it detects motion.

Pro Tip: Monitor central areas to take advantage of its 120º field of view.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Extra Keypad

An extra keypad for garage door entrances, back doors or upper levels of your home. No power needed.

Pro Tip: Don’t buy this now. Your SimpliSafe comes with one already. If you want more later, it’s easy to add them.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Extra 9" x 9" Yard Sign

Homes without security systems are 3x more likely to be robbed. Let intruders know who’s boss.

Pro Tip: One comes free with your system. Get more if you live on a corner or have a huge garden.

How many do you need?

Don’t worry. It’s easy to add more later, or return ones you don’t need.

Monthly prices presented using

Prices displayed are an example of a 24-mo. payment plan. Order total must be $150+ to select Affirm at checkout.

Test out your SimpliSafe system. If you aren't 100% delighted, call us within 60 days for a full refund and let us pay for return shipping.

Questions? Call 1-800-920-2420

Package Equipment:

$0.00/mo or pay in full $0.00

Extra Equipment:

$0.00/mo or pay in full $0.00

The Knox in your home

Base Station

The brains of the system. Built with a backup battery in case of a power outage. Just plug it in to start protecting.

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Imagery used on the Floor Plan component on the Package pages.

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Professional Monitoring

Core protection against break-ins, fires, and floods powered by Fast Protect™ technology. Security agents are ready around the clock to request dispatch for break-ins and emergencies, all with no long-term contracts or hidden fees.

Agents can see and speak to intruders inside your home during an alarm using the Smart Alarm Wireless Indoor Camera*
Fast police response with verified video evidence*
Built-in cellular connection that keeps you linked to professional monitoring in a power outage

Peace of mind that starts at installation

Set up your new SimpliSafe system yourself or have a highly trained technician do it for you. Either way, you’re backed by expert customer support and a 100% satisfaction guarantee.

Built for the unexpected

Real home security prepares for the worst. So we built backups. And backups for those backups.

SmashSafe

An intruder can damage the keypad. Doesn't matter. We still alert the police. Sorry, bad guys.

Twice Secured

Built-in WiFi. Built-in cellular too. One connection down? The other’s still up. That means your home is always secure.

Built for the unexpected

Real home security prepares for the worst. So we built backups. And backups for those backups.

Disaster Ready

We have numerous monitoring centers spread across the country.

Power Outage Protection

The power fails. We don’t. In a blackout, a back-up battery kicks in and can protect you up to 24 hours.

Built for the unexpected

Real home security prepares for the worst. So we built backups. And backups for those backups.

Confirmed Alerts

Alert confirmation is big. It means that we send an alarm signal until the monitoring center confirms they got it. It’s how you can be absolutely sure help is there when you need it.

Deep Encryption

From sensor to Base Station to monitoring centers and back, your signals are encrypted.

Complete control at your fingertips

Arm and disarm your system with one press of the keypad or through the SimpliSafe App. If an intruder tries to destroy the keypad, it’ll notify our monitoring center immediately.