Trailer Wire Converter ZCI Zero Contact Interface Universal ModuLite; FEATURES: ZCI Zero Contact Interface Universal ModuLite ZCI sensor technology and direct connection to the tow vehicle battery, eliminates all electrical connection and interference with the tow vehicle electrical system. Vehicles with 12 volt system only. NO CUTTING OR SPLICING VEHICLE WIRING!. Isolates Trailer Light Operation from Tow Vehicle's Electrical System. Works with 2 or 3 wire systems. Works with PWM or Multiplexed systems requiring 2 or 3 wire hookup. Rated for up to 4.2 amps for turn/stop & 7.5 amps for taillight trailer circuits. Works with low side switched vehicles. Integrated auto resetting short & overload protection. Robust design allowsfor interior or exterior mounting Intelligent trailer braking is the key to the success of the Tekonsha product line. What began as a manufacturer of RV stairs and steps in 1964, Tekonsha has evolved to become a trusted name in towing safety. The core product line consists of brake controllers, electrical wiring and trailer brakes. The Tekonsha line has been trusted by professional towers and weekend warriors for worry-free travel. Professional equestrian trainer, Stacy Westfall is sponsored by the Tekonsha line. Westfall trusts the safety of her horses with Tekonsha brake controls. Smooth, predictable stopping at all speeds has made the Tekonsha Prodigy, Primus and Voyager trailer brake controls the best in class and most popular on the market. No matter what you are towing, Tekonsha will help you stop it - Life is a journey, stop often.