RoadGuard Interlock offers ignition interlock devices (IIDs) for your car. Our IIDs are reliable and easy to use, and we offer installation services at our location in Nashua, NH. We are committed to helping our customers achieve their ignition interlock requirements and get back on the road.

LifeSafer Ignition interlock is the leading ignition interlock provider nationwide and home to “No-Call Install”, the first fully online installation booking tool. LifeSafer’s locations are NH certified and our expert technicians at 45 Lowell St can handle all your installation and calibration needs. LifeSafer has over 30 years of ignition interlock experience and has helped over 1.5 million people get... Read More about LifeSafer Ignition Interlock