The A-2TS SOLAR CLASSIC is a solar powered variant of our famous Original Classic. It features a precision solar powered all metal movement that has 6 month power reserve, excellent accuracy & reliability... and requires no batteries or charging. The U.S. Patented Unibody 40 mm matte finished solid titanium case offers extreme durability and light weight comfort. The functional high contrast dial is easy to read and offers 12-24 hour time w/ date. Also, equipped with a scratch resistant R-Type sapphire crystal... and like all Original Classics... a rugged screw down crown & back, date, Active Comfort band, Swiss super luminous hands & markers, & 200 M water resistance. The power reserve is 6 months with a full charge (which takes only 5 hours of sunlight)... what this means is the watch can sit in a drawer (with no light exposure) for up to 6 months and still keep perfect time.SPECIFICATIONSCase Diameter: 40mm Weight: 2.2oz (63g) Band Size: 22mm Wrist Size: Fits all to smaller Water Resistance: 200mm Crown: Screw down and caseback Movement: Japan All-Metal Jeweled Solar Power Crystal: R-Type Hardened Sapphire Crystal Luminosity: Swiss Super Luminova Low Power Indicator ?Date 3 year manufacturer warranty