EFR-534BKG-1AVDF

Case / bezel material: Stainless steel / AluminumSolid BandStainless Steel BandOne-touch 3-fold ClaspMineral GlassScrew Lock BackBlack IP100-meter water resistanceLED Light (Super Illuminator) Afterglow1-second stopwatch Measuring capacity: 59'59 Measuring modes: Elapsed time, split time, 1st-2nd place timesDate displayRegular timekeeping Analog: 3 hands (hour, minute, second), 3 dials (stopwatch seconds, stopwatch minutes, 24-hour)Accuracy: ±20 seconds per monthApprox. battery life: 2 years on SR920SW (3 hands and 3 dials) 2 years on CR1616 (Light 16 [sec/days])