basic information Case dimensions (height x width x thickness) 40.9 × 35.8 × 8.1 mm mass 51 g Case/Bezel Material resin band Metal band (stainless steel) Free-type clasp waterproof Waterproof for daily life Power supply/battery life Battery life: about 3 years Exterior glass Resin glass Band size 150-205mm Clock function World Time Dual Time stopwatch Stopwatch (1/100 second, 60-minute timer) alarm Time alarm/time signal calendar Auto Calendar accuracy Average monthly difference: ±30 seconds others Switch between 12/24 hour time display.