Incremental variations in the detailed square dot texturing on the wristband take casual urethane materials up a notch. Case / bezel material: Resin / Stainless steel. 31 time zones (48 cities + coordinated universal time), daylight saving on/off. Full auto-calendar (to year 2099).Accuracy: ±15 seconds per month. Battery life: 3 years on SR726W × 2. Size of case/total weight: 49.3×44.4×11.8mm / 72g.