Certified and Insured 12volt mobile Technician. DMI Techs cover the USA installing mobile equipment in fleet vehicles including GPS tracking, backup cameras, 2 way radios, alarms and any equipment that our customers need to run there fleets. DMI works close with several different types of 12/24 volt product suppliers to help bring customers the most advance products, information and installations. DMI looks at each customer as a partner and works with them to grow together.