Gold ion plated band Mineral Glass Screw Lock Back 100-meter water resistance Case / bezel material: Stainless steel Stainless Steel Band One-touch 3-fold Clasp 1/10-second stopwatch Measuring capacity: 59'59.9'' Measuring modes: Elapsed time, split time, 1st-2nd place times Date display Regular timekeeping Analog: 3 hands (hour, minute, second), 3 dials (stopwatch 1/10 seconds, stopwatch minutes, stopwatch seconds) Accuracy: 20 seconds per month Approx. battery life: 2 years on SR920SW. Size of case: 54.1x49.5x11.7mm. Total weight: 185 g.