Takes the Worry out of using Pedometers--Wear it anywhere in your pocket, purse or backpack Accurate Tri-Axis Motion Sensor --100% Solid State -No moving parts -7 Day Memory Recall Accurately counts steps taken up to 100,000 Measures distance traveled up to 999.99 Miles or KMUse it as a Personal Fitness and Activity Diary: Track the progress of your health and fitness program in several ways over time.7 Day Memory Recall of results. Shows multiple results together. Automatically records time spent walking, running or hiking.Estimates Calorie Consumption up to 10,000 caloriesLarge Digits make results easy to read. Accurate Tri-Axis Motion Sensor technology offers the most accurate results ever.No need to wear it on your waist...put it anywhere you please. 10 step filter reduces erroneous results.The M339 has a Sleep mode when not in use to extend the battery life. Battery included, easily replaceable when necessary.Assortment includes six colors red, blue, yellow, green, orange, and purple.