General Info

Guardian Ignition Interlock is MDs most affordable ignition interlock device. Guardians device is discreet and one of the easiest to use devices on the market. With over 30 years of experience, Guardian is one of the most trusted iid brands. Our location at 2914 Mountain Rd is MD certified with expert technicians for all your interlock installation and calibration needs. Guardian alcohol monitoring products include 24/7 customer support so we're always here when you need. Schedule an installation today and get back on the road with our quick and easy installation process!