KēZ Plug & Play Adapter
Smoke Detect

Detect smoking inside your vehicle !

Monitor smoking inside your vehicle!

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Smoke detection inside a vehicle is now possible using the KēZ adapter.

The KēZ smoke detector is ideal for use by car rental companies, fleet and car sharing operations which prohibit smoking within their vehicles!

The exact time that smoke is detected within the vehicle can be recorded and saved to the cloud based server. With this recorded evidence, a chargeback penalty can be applied.

Families with young adult drivers can now determine if the driver has been smoking when driving and can differentiate and record whether the smoke is from tobacco or cannabis. 


With the KēZ adaptor installed an 85 Db alarm will sound once smoking is detected, reminding the smoker that the vehicle is smoke free.

Keyfree is here to facilitate a smoke free vehicle with a solution that is affordable, simple and secure.

We believe that the KēZ smoke detector will be an ideal addition to law enforced DUI programs that include the Ignition Interlock Program which requires the use of a breathalyzer for drivers who have been convicted of driving under the influence of alcohol. For those drivers convicted of driving under the influence of drugs, the KēZ adapter and app will detect and record the incidence of cannabis if it is smoked within the vehicle.


The new user onboarding process uses the latest authentication programs to speed up your registration process, 2FA


Your vehicle[s] can be anywhere including remote locations such as underground parking garages. By using Bluetooth and not cellular data, your renters won’t have to worry about poor connection areas.


Only the person who registered the adaptor will receive the notifications from the smoke detector.


Have the option of time-stamping your vehicle[s] so you know exactly when they’ve been picked up and dropped off. Keep tabs on rentals with ease with the Keyfree timestamp feature.


The Keyfree solution is compatible with many makes and models allowing for your fleet of vehicles to be covered all the features that are available with the adapter.

How To Use App Video

Registration in Three Simple Steps

Enter email and full name and phone in to the KēZ app

Available on both iOS and Android smartphones, the KēZ app is simple to download and provides easy and convenient access to your car(s).

Register your vehicle to your profile and start driving.

Once setup the adapter will keep a real-time log of the air quality inside your vehicle. Any detected smoke will be logged and reported to the server.

You will receive notification when smoking is detected.

The owner of the vehicle and the smartphone used to register will receive status notifications on all detected events. The notification will specify whether the smoke is from tobacco or cannabis.


KēZ Premium features include the following:

Smoke Detection

From lending your car to a friend to on-demand car rental and peer-to-peer car sharing for corporate fleets, KēZ is pioneering smart phone-centric technology to power the revolution in smoke detection.

The KēZ adaptor and app provides a smoke detector and log which can detect smoking within the vehicle and will create a silent history record, and if required a sound alert if smoke is detected. The history log is created to record the time, date and level of smoking within the vehicle which can be downloaded from the KēZ app. 

Car valuation experts say that cars can lose as much as $2000 from their resale value if they have been smoked in. 

Many rental and car sharing companies charge a penalty for smoking in the car, KēZ will record the state and time of an occurrence and will sound an alarm if required.

Speed Recording

Having KēZ installed allows you to set speed controls on your car with the time and date that speeds were recorded over the speed limit selected.  Whether it is to check on your son or daughter, your renter speeding in your car, or your insurance requirements, KēZ will record the information for you.

Security Alarm

The alarm system in most cars are sophisticated but will only alarm if there is an attempted intrusion. The KēZ app has variable adjustment capability and it can be adjusted to the highest level so that if the car is touched the alarm will be activated and the horn will honk. Keeping your vehicle protected at all times. 

The KēZ adaptor will provide:


driver behaviour


vin authentication


Smoke Detection


Battery Evaluation


Mileage log


Speed log


All KēZ systems are fully digitally controlled using state of the art microprocessor technology

with security features to the highest level. These additional features are compatible with 85% of vehicles.

Driver Behaviour

Keep a record of driver performance

VIN Authentication

Provides authentication of driver

Electronically provide access to your trunk

Give anyone access to your trunk with a few taps on your smartphone

Log battery function

Detect low battery levels so you will never be stranded again.

Mileage tracking

Keep a record of distance travelled and time-stamp each trip

Lot Monitoring

Manage multiple vehicles with single parking location. Know what vehicles are coming and going and have a report on the KēZ smartphone app.

The KēZ Smartphone App leverages the smartphone to allow for 3rd party services to dispatch road service such as tow trucks, mobile mechanics, or car detailing.

Have some questions? Need some help?
Get your answers below.

Yes. Keyfree Technologies Inc. is prepared to work with any product manufacturer company that sees the substantial benefits of using its adapter and app in order to provide information on the smoke detected inside a vehicle.

No. Every renter who wishes to enter the program offered by the car rental company does so willingly and with the renter’s full approval, in order to obtain the benefits being offered by the car rental company.

If required, the adaptor can very easily be programmed to provide information on all the above. It already has an accelerometer chip which is used to detect and log rapid acceleration and hard breaking. Adapter has its own clock which can be set to capture driving of the car during the risky hours.

No it does not require a data plan, but end users would require a smartphone with internet connectivity to receive a digital key.

Yes. The approved driver’s could defeat the confirmation of the VIN and the smartphone ownership, but all of the other information would still be collected by the KēZ adaptor and stored on the KēZ server.

The owner, whenever required, can draw the information from the server in a PDF format.

No. The KēZ adapter will not “run down” the battery of the policyholder’s smartphone. All of the information obtained from the KēZ adaptor and app is stored on the KēZ server and the policyholder’s smartphone is not used to send information back to the insurance company. The KēZ app is of course downloaded onto the policyholder’s smartphone.

KēZ is compatible with most passenger vehicles dating back to 1996. Just enter your vehicle information on “Compatible Vehicles” on the Home page to see if your year and model vehicle is compatible. For some new cars, access will be in conjunction with the vehicles’ API or hardwired harness for which instructions will be available on website or KēZ app.

KēZ is protected by 256-bit encryption technology, making it resistant to hacking attempts.  It incorporates different layers of digital security features when accessing a vehicle. In addition, digital keys can be disabled or deleted at any timer. KēZ is in fact more secure than your traditional key. It allows you to selectively allocate keys to vehicles or freeze the usage of keys to users anytime.

Looking for more resources?

Find a lot of useful resources and tools to customize the KēZ adaptor with your personal vehicle or fleet.

KēZ w/ Vehicle Tracking

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