Oregon Scientific SE138 Strap Free Heart Rate Monitor
displays current heart rate (does not display continuously)tracks calories burnedstopwatch timer counts up to 99hr 59min 59sec 59milisec with 1/100th second precision12/24-hour clock with alarm function and calendarel backlight for easy viewing in low-light conditionswater resistant up to 164ft/50mshock resistant up to 3ft/1mrequires one cr2032 battery (included)