* SODIAL is a registered trademark. ONLY Authorized seller of SODIAL can sell under SODIAL listings.Our products will enhance your experience to unparalleled inspiration. SODIAL(R) Blue Sport Exercise Stop Watch Calorie Counter Heart Rate Monitor. Calculate your heart rate and the calories burned according to the preset age, weight and sex. ( Please refer to the user manual. ) This item has 5 modes. Select the modes by pressing "MODE". Time mode: display time and calendar Alarm mode: daily alarm and hourly chime Chronograph mode: stopwatch function Measure mode: calculate heart rate and calories burned Exercise time mode: show the duration of exercise 1 CR2032 battery needed (included) 1 X Calorie Heart Rate Watch 1 X User manual