The Life Fitness Elliptical Lower Motor Control Board Controller GK61-00002-0009 is a green plastic controller designed for the X9i w-Polar HR elliptical model. It is specifically designed for gym and training activities, with adjustable features and a compact size of 8 inches width and 1 lb weight. This controller is compatible with Life Fitness equipment and is suitable for elliptical machines, providing a reliable and efficient control board for your fitness needs.