Mineral Glass Screw Lock Back 100-meter water resistance Case / bezel material : Stainless steel Stainless Steel Band One-touch 3-fold Clasp 1-second stopwatch Measuring capacity : 29'59 Measuring modes : Elapsed time, split time, 1st-2nd place times Date display Regular timekeeping Analog : 3 hands (hour, minute, second) 3 dials (stopwatch minutes, stopwatch seconds, 24-hour) Accuracy : ±20 seconds per month Approx. battery life : 3 years on SR920SW Size of case :  54 × 47.2 × 12.1 mm Total weight : 147 g