Movement Caliber Number H855 Movement Type Solar Accuracy ±15 seconds per month Functions Power save function Alarm function (daily alarm) Full-auto calendar correct to the December 31, 2100 LED (the built-in illuminating light) function Case/Band Case Material Stainless steel and plastic Case Size Thickness:14.2mm Diameter:46.9mm Lug-to-lug:50.9mm Crystal Hardlex LumiBrite LumiBrite on hands, index(es) and bezel Band Material Silicone Lug width 22 Other Details Water Resistance 200m / 660ft diver's Magnetic Reluctance 4,800 A/m Weight 115.0 Features Screw case back Unidirectional rotating bezel Screw-down crown Screw case back