the omron tri-axis alvita optimized pedometer is designed for power walking and aerobic exercise. the alvita optimized counts your aerobic steps separately from normal walking steps. it also tracks the distance traveled, calories burned, and time walking (giving you more information about your overall activity level). it accurately counts every step using omrons tri-axis technology. the hj-321 pedometer also has seven-day memory to track all of your activity over the course of a week. it has four separate activity modes for an even more accurate description of movement; just wear it on your hip or place it in your bag or pocket. this pedometer features four tracking modes: measure walking steps, aerobic steps, distance covered, and calories burned to show how much you've progressed. the automatic reset function resets the pedometer at midnight every night for the most precise daily count. tri-axis technology keeps this activity tracker accurate in almost any position, so you can keep it in your purse, your pocket, or on your hip and never miss a step. the seven-day memory allows you to store and review up to one week of activity data. whether your goal is weight loss or simply increased overall health, our step-tracking pedometer will help you succeed.