The Polar RC3 GPS Watch with Heart Rate Monitor has a variety of performance logging features, the integrated GPS system tracks your altitude, route, speed and distance. Main features include, route mapping, 'Back to Start' programming, distance measurement and performance measurement index. Highlight features include ZoneOptimizer, which adjusts personal sport zones for every training session based on your current physiological condition. This feature gives you the right heart rate zones depending on your physiological state at that exact moment, making sure that the you are always training at the right intensity. Sports profiling guarantee swift switch between different sports. The watch also gives an accurate heart rate even in water with a comfortable hybrid transmitter. The watch is lightweight and features a sleek design which not only looks great but is far less bulky than most other watches of this type fitting under your wetsuit sleeve without any difficulty. The watch offers immediate feedback after your training, giving in-depth info and analysis after each session, and for even more detailed feedback as well as downloadable training programmes, you can visit polarpersonaltrainer.com. The on-board CPU can also measure your performance and give you feedback on how much you've improved and performed against previous training. Calculated after every session, the Running Index will even tell you, based on your GPS and HRM data when to put in more effort to make your training as efficient as possible. In the Box: Polar RC3 GPS Training Computer Polar H3 heart rate sensor USB cable RC3 GPS getting started guide