Be confident using your Interlock

It can take practice and patience when learning how to use an interlock. The entire LifeSafer team is committed to making using your interlock easy and intuitive. This step by step guide below reviews how to successfully use your device.

Give yourself extra time, especially during the first month of use. Soon using your interlock will become a regular part of your routine.


Turn your key halfway to power up the device. Take a drink of water to rinse your mouth. Take a nice deep breath and prepare to take your test. You will have one minute to blow into the device.


Relax and blow steadily into the device for 5 to 7 seconds. The device will emit a tone, indicating that you are doing the test correctly. You will hear a second beep and click to signal the sample is sufficient.


Once you see the “PASS” message on your device, start your vehicle and get going. You will be prompted for rolling retests during your drive.

Have more questions about using your Interlock?

We are here when you need us. Call our Support experts at 855-710-2423.

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