Polar RS800CX Run Heart Rate Monitor Heart rate monitor helps elite runners plan, track, and analyze every part of their training Automatic/manual target zone, backlight, display zoom, easy start setting wizard, and event countdown timer; water resistant to 50 meters Graphical target zone indicator, heart rate (displayed as % of maximum heart rate, HRR%, or BPM), sound volume level setting, and user-configurable displays Comes complete with RS800CX heart rate monitor, ProTrainer 5 software, WearLink+ transmitter W.I.N.D., s3 stride sensor W.I.N.D., IrDA USB 2.0 adapter, and user manual Includes limited two-year manufacturer's warranty