Features: resin case resin strap quartz movement resin crystal black dial digital display multi time world time 31 time zones 1/100 second stopwatch countdown timer 5 daily alarms hourly time signal led backlight afterglow full auto calendar button operation tone on/off regular timekeeping 12/24 hours display day and date display screwed case back buckle clasp splash resistance approximate case diameter: 33.7mm approximate case thickness: 8.6mm