Features: shock resistant 200 meter water resistant el backlight with afterglow multi-function alarm flash alert 1/100 second stopwatch countdown timer auto-repeat function hourly time signal daily alarm world time 29 times zones (48 cities) scratch resistant mineral glass full auto calendar (pre-programmed until the year 2039) 12/24 hour formats accuracy +/- 15 seconds per month approx.Battery life 2 years casio resin strap module 3160 case diameter 47mm case thickness 13mm weight 50.5g