Polar RS800sd Heart Rate Monitor Watch Wrist-style heart rate monitor and stopwatch geared for elite level athletes and coaches With included S3 Stride Sensor, receive highly consistent and accurate speed/pace, distance and cadence data Polar WearLink W.I.N.D. transmitter with 2.4 GHz disturbance-free transmission Includes Polar Protrainer 5 training, planning and analyzing software Dual time zone, alarm with snooze, and water resistance to 50 meters