Activates ski mode. Offers a choice of different preset acceleration curves for perfect launch every time when towing a skier or wakeboarder, plus steady tow speed. User-friendly interface on gauge. Simple plug-in connection. Includes hardware necessary for installation. Note: Harness (278002569) and 3 amps. fuse (710001008) are required to install on 2011 to 2017 models. GTI, GTI SE, GTR (2020 and up) GTI (2018-2019)/GTI SE, GTI LTD, GTR (2018 and up)/RXT, RXT-X, GTX, GTX LTD (2018 and up)