Set contains the adapter, installation CD and a cable provides that link by enabling a two-way infrared data communication communication between your polar product and PC perfect for once you have completed training view your results Once you've completed your training, you're ready to view the results using the Polar Protrainer 5 softeare. The IrSA USB Adapter provides that link by enabling a two-way intrared data communication between your polar product and PC. The set contains the adapter, installation CD and a cable. Transfer your training data quickly and easily with the Polar IR USB 2.0 adapter. You'll be able to download data from your HRM wirelessly to your PC via infrared signal so you can take an in-depth look at your stats. Store and analyze critical performance data and maintain a detailed training log. The IR interface works with the Polar F55, AXN500, AXN700, RS400, RS800, S610i, S710i,S720i S810i, S625X, S725, and S725X. About Polar The first EKG accurate wireless heart rate monitor was invented by Polar back in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of "intensity training" by heart rate swept the athletic world in the eighties. By the 1990s, individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people trying to lose weight. Polar is the leading brand among consumers, coaches, and personal trainers worldwide and the company is committed to not only producing the best products, but also being the leading educator on the benefits of heart rate based exercise.