SUPER MUTT DLX (DL PKG & EXT HOSE/CABLE PK)9008-DLEXT Innovative Products Of America Super MUTT Trailer Tester Deluxe Edition with Extended Hose / Cable Pack - The Super MUTT® Trailer Tester is a Mobile Diagnostic Trailer Tester that places a load on the trailer�s electrical circuits to identify wiring problems while providing remote control operation over both air brakes and lights. Built to facilitate a one-man testing operation, the Super MUTT® reduces guesswork and inspection time to prevent failures that lead to expensive road calls and citations. The remote control allows for repetitive air brake actuation at each axle to reveal developing problems often missed by normal testing procedures.The most advanced Super MUTT® to date includes such features as a mute bypass switch and internal regulator.