smartheart se300 heart rate monitor a multi-functional heart rate monitor which measures workout speed and distance as well as tracking percentage of fat burned, time and calories burned. heart rate alarm can be preset as an audible or vibrating alert. the se300 provides a smart training program for the user to achieve the best benefit from their exercise regime. monitor heart rate, speed, distance, calories burned, percentage of fat burned, and time elapsed. preset workout distance or time targets, and track progress to goal through the target function. heart rate alarm can be set to beep or vibrate.