Features: bio-based resin case bio-based resin strap quartz movement mineral crystal blue dial digital display shock resistant 1/100-second stopwatch countdown timer multi-function alarm hourly time signal flash alert led backlight full auto-calendar regular timekeeping 12/24 hours display month, day and date display screwed case back buckle clasp 200m water resistance approximate case diameter: 40.5mm approximate case thickness: 11.9mm