This Sper Scientific Stopwatch features a large display with 1/100 second resolution, split time display, clock/calendar mode and alarm functions. This Sper Scientific Stopwatch is shock and water resistant, and has a large 5/8" high display for good visibility. 1/100 second resolution stopwatch with split time display. Also features an alarm clock with chime, calendar and 12 or 24 hour time modes. The rounded, ergonomic design fits neatly in your hand. Lanyard, instructions and button cell battery are included. Dimensions: 2 1/4" x 3" x 3/4". Weight: 1.5 oz.