iSport Brand W117 Heart Rate Monitor, Calories Burned Counter, Exercise Timer Average Heart Rate, Maximum Heart Rate, % of Max. Heart Rate Calories Burned Counter, Exercise Timer, Exercise Data Recall, In-Zone Timer 3 Selectable Heart Rate Zone, Upper and Lower Heart Rate Zone Alarm, Audio and Visual Alarm in Target Zone, Daily Alarm 1/100 Second Chronograph, Time and Date Display, EL Backlight, Imperial or Metric System Option 30M Water Resistant, Analog Transmission