Casio Men's Heart Rate Monitor watch #CHR1001V 50-meter water resistance, Resin Glass / Spherical Glass, Electro-luminescent backlight, Heart Rate Monitor Heart Rate Monitor, Personal data setting ranges, 1/100-second stopwatch Workout data, Daily data, Weekly data, Countdown timers, Daily alarms Hourly time signal, Full auto-calendar (to year 2099), 12/24-hour format, Regular timekeeping: Hour, minutes, seconds, pm, year, month, date, day Accuracy:15 seconds per month, Approx. battery life: 2 years on CR2025, Size of case/total weight: 55.7 X 36.1 X 12.8 mm/33 g