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

November 1 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. Learn More

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.