Chronograph measures elapsed time 1/100 Second Stopwatch up to 60 minutes 24 hour alarm and hourly time signal 12 or 24 hour time Day-Date-Month calendar Double locking clasp Screwdown caseback Lumibrite hands and markets for night-time visibility Illuminating light Nightfall finish is a high-tech combination of titanium, carbon and nitride. This plating process creates lustrous finishes in shades of black and gray. Water-resistant to 100 meters