Sigma ROX 10 Cycling Computer and Butler Mount. Ensure every ride is a perfect 10. The Sigma ROX 10.0 GPS cycling computer is equipped with navigation, bike, performance and altitude measuring functions, and so much more. Not only is this Sigma's first bike computer with GPS, its ANT wireless transmission technology means you can pair this unit with your own ANT devices such as power meter or heart rate monitor to delve even deeper into precision training. With the ability to record information in as short as one second intervals, plus the included Data Center 3 software, you'll have all the tools necessary to propel your fitness to new heights.