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The Smart MUTT is a portable trailer light tester and abs tester for the mobile and commercial trailer repair technician. It places a load on the trailer’s electrical circuits to identify wiring problems while providing remote control operation for the lights. The Smart MUTT also provides an easy method to accessing trailer ABS blink codes. Built to facilitate a one-man testing operation the Smart MUTT reduces guesswork and inspection time to prevent electrical and ABS failures that lead to expensive road calls and citations. The Smart MUTT requires an internal 12V DC battery or DC external power source for operation. The internal battery can be purchased separately or directly from a battery distributor.