The Polar V650 is a Cycling GPS Unit with great features to help you train. First of all the unit has a large touch screen which makes for easy reading and use. The V650 has enough memory for up to four different bikes, you can set up each bike with the sensors the unit should look for when riding (compatible with Polar Bluetooth Smart Heart Rate and cycling Sensors only). The computer has four sport profiles; road cycling, mountain biking, indoor cycling and other. All of theses profiles can be altered and customised to suit you are your training sessions. You can have up to six screens with up to eight data fields each, and there are a huge amount metrics you can set in those slots. But in addition to the standard numerical views, you can set visualisations: an altitude graph, HR graph, HR zones view and the speed graph.