The Polar RCX3 multisport watch will prove an indispensible tool if you're a runner or cyclist wanting smart guidance while preparing for your next event. Polar's RCX3 watch can measure your average, maximum and minimum heart rate. You can use this data to set your own personal training zones and use the watch to help you work at the right intensity. The Polar watch's Fitness Test tells you exactly how your fitness is developing. You can track this progress online and using the Running Index to see how efficient your workouts are. Other features include: Polar RCX3 training computer Polar WearLink®+ transmitter Polar G5 GPS sensor Polar DataLink data transfer unit RCX3 Getting Started Guide G5 GPS sensor User Manual