A “Rolling Retest” is simply a breath test while you are driving. According to State of California regulation, you are required to periodically submit the additional breath samples while you are driving in order for you to continuously prove the absence of alcohol. When undergoing a rolling retest (within 4 to 12 minutes of starting your car), the device will ask you to provide another breath sample. Following this test, you will be asked for another set of samples approximately every 15 to 25 minutes. In the case that you are uncomfortable providing the samples while you are driving, our device gives you approximately 5 minutes to safely pull off the road and retest.