iSport Brand W118 Heart Rate Monitor, Calories Burned Counter, Exercise Timer Maximum Heart Rate, Average 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 Day Display, EL Backlight, Imperial or Metric System Option 30M Water Resistant, Alalog Transmission