TIS Pro 025 Water Resistant Stop Watch Keep track of your lap times in the pool or on the track with the TIS Pro 025 Water Resistant Stop Watch, featuring a water and shock resist construction for durability over time. Product Specification: Large Scale Display Date Display Support 12/24 Hour Display Format Chrono Data, Stores Data for Each Run with Data Tag 1/100 Second Precision Chronograph with Split Memory Daily Alarm Hourly Chime Cr2032 3V Lithium Battery with Battery Hatch for Easy Replacement Water and Shock Resist Construction Lanyard Included