SaltDogg 3011864 Variable Speed Controller with Vibrator Switch For use with SaltDogg TGS01 tailgate salt spreader For use with SaltDogg TGS05 tailgate salt spreader For use with SaltDogg TGS06 For use with SaltDogg TGS07 tailgate salt spreader For use with SaltDogg TGSUVPRO series tailgate salt spreaders