Case: Ceramic bezel 316 stainless steel case Brushed finish 1.2mm mineral crystal Highly legible Super-LumiNova display with long-lasting luminescence 3BAR / 3ATM / 30M daily waterproof water-resistance Crown diameter: 6.5mm 40 x 45mm 20mm lug Movement: MIYOTA mechanical movement Unidirectional self-winding via Perpetural rotor Frequency: 21,600 vibrations per hour (3 Hz) Accuracy: +/-12 sec/day, after casing Power reserve: approx. 40 hours Functions: hour, minute, and second hands Instantaneous date with rapid setting Stop-seconds for precise time setting Bracelet: Tapered 22-20mm 316L stainless steel band with butterfly clasp