PUMA Unisex PU910501004 Cardiac II Black Heart Rate Monitor Watch Chronograph, count-down timer; Heart rate monitor with wireless ECG sensor belt included and preset HR zone or manual set hi/lo HR zone Equipped to display heart rate as BPM, heart rate as percentage of maximum heart rate, HR max (age based) calories burned during workout, minimum HR of total exercise, maximum HR of total exercise and average HR of total exercise Dual alarm LED HR zone indicator, EL backlight Water resistant to 165 feet (50 M): suitable for swimming and showering