Short of dropping around an additional 1,000 for an ANT power meter, the Cyclo 315 HC GPS Cycling Computer Bundle equips Magellan's most popular GPS head unit with every training metric an aspiring racer could ask for. The included heart rate monitor and speed and cadence sensor transmit wireless data to the versatile Cyclo 315, and this being Magellan you know the lengthy menu of SiRFstarIII GPS features and functionality give you enough route planning, recording, and detail parsing options for even the most seasoned veteran. As far as space age exploration is concerned, the Cyclo 315 features all the same navigational genius of the more expensive 505 with two exceptions: no Bluetooth or smartphone connectivity. Detractors may complain that this means they won't get text, e mail, and phone call updates on their head unit to which we say: this is a cycling accessory. Quit worrying about the phone and ride. It ANT connectivity does mean it can hook up with a compatible power meter, and it'll also pull info from a Di2 setup running with Shimano's D Fly wireless system. Like the 505, the Cyclo 315's pre loaded maps include cycling specific notations restaurants, bike shops, and generous shoulders and dedicated lanes are all called out, keeping you informed of possible coffee stops and pleasant alternatives to gravelly, debris strewn shoulders on sketchy highways. By creating a rider profile, you can also ensure that you don't find yourself traversing punishing grades on a rest day or hitting dirt or gravel roads on your carbon rims and supple race tires. For off road riding, it will also ensure that you spend the maximum amount of your ride navigating lines through rock gutters and root lattices instead of traffic furniture. If you'd rather introduce an element of exploration to your ride, the Cyclo 315 also shares the 505's Surprise Me feature. Surprise Me automatically generates three prospective routes for you to choose from. Just to make you're your...