Since 1983, Accusplit has worked with the Kato family of Japan to develop pedometer technology such as the Jw200 (digi walker xl) pedometer step sensor. Built exclusively for Accusplit using the same Jw200 pedometer step sensor (also known as the digi-walker engine) used on the rest of the ae100xl Series. The ae190xlm is fully loaded with memory features; counts up to 10 million steps! excellent accuracy. Tracks user-selectable goals for steps, distance, calories and activity time. Counts steps walked or jogged up to 100,000 steps before rollover. Automatically counts activity time up to 10,000 minutes before rollover. Counts distance traveled during step activity, up to 999.99 MI or KM, then rollover. Automatically counts whenever step activity is occurring. Counts calories consumed during step activity up to 9,999.9 Kcal then rollover. Automatically counts whenever step activity is occurring. Uses a proprietary formula for high accuracy in calorie computation. Has total memories for steps, distance, calories, and activity. This allows you to reset your pedometer each day, week, or month, while keeping your total values intact. Adjustable stride length for greater distance accuracy. Adjustable weight setting for greater calorie accuracy. Closed case protection of display and reset button. Steel clothing clip is the strongest available. Bends towards the body to prevent chafing. Polycarbonate case construction for extra toughness. Manufacturer 5-Year dual no proof & proof of purchase warranty. Dual leash slots incorporated into case to help prevent accidental loss. Includes free 3-way pedometer leash.