For those who want basic heart rate-based features to keep their fitness training simple. re improving fitness based on your heart rate. Displays calories burned. Comes with comfortable fabric transmitter and coded heart rate transmission to avoid crosstalk. Calculates your heart rate zones based on your age. Records your average and maximum heart rate while training. Displays heart rate as BPM of %. Save 10 training files including the session summary. Graphical target zone indicator for easy view of required action. Watch features: backlight, date, dual time zone, key lock, low battery indicator, alarm and snooze, user replaceable battery. Water resistant 30 m (100 ft.). Due to federal shipping restrictions regarding products containing lithium batteries, this product can only be shipped to the 48 contiguous states. It cannot be shipped to Canada,?