The dial side memory has a scale that allows you to easily know the pulse for about 1 minute by taking 20 pulses. The included carabiner makes it easy to attach to the bag during checks, attach it to a wagon, or even attach it to a belt holder on your pants. Inverted dial makes it easy to see from yourself. Luminescent hands are used for the hour and minute hands to tell time in the dark. When shipping, please remove the crown and adjust the time before pushing it in.