Case Size (Length x Width x Thickness): 1.9 x 1.7 x 0.5 inches (48.9 x 42.8 x 13.4 mm); Weight: 2.0 oz (53 g); Case/Bezel Material: Resin resin band; Impact resistant structure (shock resist): 20 ATM waterproof battery life: Approx. 5 years with inorganic glass band attachable size: 5 - 8.9 inches (14.14.14 inches (20 inches (20 - 20 inches (20 mm). 59''99'' 1 second (1:00'00''~23:59'59''), 24 hour meter), with split timer (set unit: 1 second, maximum set: 24 hours, 1 second increments, auto repeat). Multi-alarm, hourly time signal flash function (alarm/hourly signal/timer/timer-linked luminescence) LED backlight (super illuminator, afterglow function). Accuracy: Average monthly difference : Switch between 15 seconds, 12 and 24 hour displays.