Features:AOS 4.5 Operating SystemLap/CUM (Dual) SplitSplit/Release ActionTiming Range 10 hoursMagnum liquid crystal display5 year battery lifeWater ResistantPackages include AX PRO Series Stopwatch, Lanyard, Battery, and Instructions Key Features?Built around the Japan ese-made JW200 PedometerEngine? Step Sensor, the current gold standard for accuracy?Extra Large Digits. ?The ACCUSPLIT exclusive case makes this the slimmest available pedometer built around the JW20 0 Step Sensor?Chromed, Spring Steel clip resists breakage.?Case includes two leash slots, for attaching safety leash on either side. Made from tough polycarbonate plastic.?Total Steps Memory counts to 10,000,000 steps! ?Step filter, can be set from 0-5 steps to further increase accuracy.