Robic Personal Activity Tracker with 7 Day Memory Diary The latest technology. --100% solid state -- no moving parts -- 7 day memory recall takes the worry out of using pedometers-wear it anywhere - in your pocket, purse or backpack. Backpack Personal fitness and activity diary: track the progress of your health and fitness program in several ways over time Accurate and dependable: accurately counts steps taken up to 100,000. Measures distance traveled. 7 day memory recall of results. Shows multiple results together Small but powerful: shows multiple results together. Automatically times time spent walking, running or hiking. Calculates calorie expenditure. Large digits make results easy to read Already have a watch wear it anywhere: no need to wear it on your waist...put it anywhere you please. Purse, pocket or backpack