From G-Shock, the Black XL Resin Digital Watch features:  black resin with blue accents and black gloss band round case shock and magnetic resistant auto LED light with afterglow four daily alarms one snooze alarm hourly time signal world time for 29 time zones and 48 cities 1/1000-second stopwatch full auto-calendar countdown calendar case size approx. 51.2mm  Water Resistance: 20 ATM Imported.