Automatic Diver’s:  SRPE99 Caliber 4R36 Vibrations: 21,600 vibrations per hour (6 beats per second) Power reserve: approximately 41 hours Jewels: 24 jewels Specifications: Stainless steel case Screw case back Screw-down crown Hardlex crystal Diameter: 45.00mm, Thickness: 13.4mm Water resistance: 200m Magnetic resistance: 4,800 A/m Stainless steel bracelet with three-fold clasp with secure lock, push button release with extender 3 YEAR WARRANTY