Transfer your critical data in seconds! The new Polar IR Interface quickly transfers the data from your HRM to your PC so you can take an in depth look. The IR Interface also allows you to upload your training zones and timers from your PC for easy programming. Store and analyze critical performance data and maintain a detailed training log. IR interface works with the Polar F55, AXN500, AXN700, RS400, RS800, S610i, S710i,S720i S810i, S625X, S725, and S725X. Compatible with USB Ports. Adapter color may vary.