For ambitious cyclists seeking improved cycling performance, Extended memory records more hours of highly accurate power data from the compatible Polar LOOK Ko Power pedals, Allows quick and safe control with the rocker switch and oversized userconfigurable display, Guarantees interferencefree transmission with W, I, N, D, technology, Training Load graph at polarpersonaltrainer, com shows when you are ready for your next ride, Dimensions: 5L x 3W x 4H, SKU: SPTMN4674