Garmin Tread Handlebar Controller is designed for easy operation of your Garmin Tread GPS on various terrains. Highlights include hands-free control while riding and compatibility with a Y-adapter cable (sold separately). It features intuitive buttons facilitating simple zooming and map viewing. It has easy Map Switching for quick selection of preferred map layers, waypoint marking, and music control. It's designed for extremes, being rugged, IP67 water-resistant for adventurous rides, and uses wired power for optimal performance. The controller includes mounting options for various vehicle setups and fits handlebars of 7/8 inch, 1 inch, and 1-1/4 diameters. It's capable of map layer selection and music control, and is dust and water-resistant. Comes with a hardware mounting kit.