We also take trade-ins on competitive brands as well as retro-fitting our system on to your competitive brand to communicate with our trailers.  Brands that we take in on trade or retrofit are : Ver-Mac , Horizon Signal Technologies , ADDCO , Odeco , Tower Sign and Signal ,3M Optical Limiting Signal Head, RC Flagman , North America Traffic , Trafcon , ASTI Transportation Systems , IST International , Intelligent Signals , K & K Systems