Specifications Case / bezel material: Stainless steel One-touch 3-fold Clasp Stainless Steel Band Sapphire crystal with glare-resistant coating Screw Lock Back 100-meter water resistance 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 / Total weight Size of case : 50×44.1×11.6mm Total weight : 138g