Guardian Interlock

Guardian Ignition Interlock is MD’s most affordable ignition interlock device. Guardian’s 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 1047 Md Rt. 3 North Unit 3 is MD certified with expert technicians for all your interlock installation and calibration needs.