Polar FT4 Heart Rate Monitor Watch (Silver / Black) Measures only heart rate and not foot steps Provides continuous, accurate heart rate to keep your fitness training simple Smart Calorie feature uses your personal data to provide accurate calories burned Includes heart rate chest strap made of soft fabric material that adapts to your body shape; Requires and includes chest strap for accurate heart rate User replaceable battery and water resistant (30m) Connects with compatible gym equipment using GymLink