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The best interlock for over 30 years.

What is a Interlock device?

The ignition interlock device (IID) is a small handheld breathalyzer for cars that measures alcohol concentration in the breath. 

The vehicle will not start if the IID registers a breath test result (BAC) that exceeds the pre-set limit. When the driver blows beneath the predetermined limit, the vehicle will start. 

Why Would I Need One?

Following an arrest for drunk driving (DUI, DWI, DUI, OWI, or OVI), installing a BAC monitor is a common requirement.

State laws determine how often these appointments occur; however, on average, they happen every 30, 60, or 90 days.


LifeSafer has integrated the entire customer experience for thousands of drivers over millions of miles. To help you successfully complete your ignition interlock program, we provide accurate, timely, and reliable services.

How do I get one installed?

The type of ignition interlock device you receive is determined by the legal requirements in your state, as well as the specifics of your DWI/DUI/OWI case.

The first step to a successful program completion starts with a licensed expert handling the installation, calibration, and maintenance. Get started by contacting Ignition Interlock USA.

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