DO NOT choose this company for an interlock/breathalyzer. This company rapes its customers. I have had TWO devices malfunction. I'm currently stranded on the side of the road because their device. I have not blew a dirty sample that would've sent me into a lockout. I pulled over when all the lights randomly came on. Then when I tried restarting my vehicle, it sent me into a lockout. I've been sitting here since Friday night and it is now Sunday. I have to wait until Monday because the service guy doesn't work the weekends. LifeSafer's only offer was for ME to pay to tow it then they would reimburse me. I don't have money to tow it an hour and a half away… Last time this happened, I had to pay the service guy to come meet me when it was clearly the malfunctioning device. He even had to replace it! Screw this company. Good luck getting them to answer the phone when you need them the most! GO WITH INTOXALOCK INSTEAD.