No matter the terrain, whatever the sport, the Polar RS800CX Multi Heart Rate Monitor is an effective tool to measure your speed and distance as well as plan, monitor and analyze your body's response to different types of training. This customizable training tool records data for different sports and synchronizes with the Polar ProTrainer 5 software (not included) to analyze your training and create individual routines. With the RS800CX you can maximize the efficiency of your recovery time and even monitor your elevation profiles.