Seiko Prospex SNJ025P Black Silicone Mens Watch lovingly called Arnie simply because it is the modern version of the watch which appeared on the arm of one of the biggest action stars in the 80's. - Movement Type Solar - Accuracy 15 seconds per month - Exterior Case Material- Stainless steel and plastic - Crystal Hardlex - LumiBrite on hands and indexes - Band Material - Silicone - Water Resistance 200m / 660ft diver's - Case Size Thickness: 13.8mm Diameter: 47.8mm Length: 50.5mm - Screw case back, Screw-down crown - Full-auto calendar correct to the December 31, 2100 - LED (the built-in illuminating light) function - Power save function