Specification MOVEMENT Caliber Number : H851 Movement Type : Solar Precision : ±15 seconds per month Power Reserve : Operating for approx. 6 months (when fully charged), power save: approx. 20 monhs Functions : Power save function, Alarm function (daily alarm), Full-auto calendar correct to the December31, 2100 LED (the built-in illuminating light) function CASE/BAND Case Material : Stainless steel and plastic Case Size : Thickness : 13.8 mm Diameter : 47.8 mm Lug-to-lug : 50.5 mmm Crystal : Hardlex LumiBrite : LumiBrite on hands and index Band Material : Silicone Distance between lug :22 OTHER DETAILS Water Resistance :200m / 660ft divers Magnetic Resistance : 4800 A/m Features : Screw case back