15 seconds per month (without receiving a GPS signal and at temperatures between 5C and 35C ) Calibre:5X83 GPS Solar Operating for approx. 6 months (when fully charged), power save: approx. 2 years Jewels:14 Product Description : Astron was created from Seikos passion for innovation, and now, under the design theme of Solidity, a series of solar timepieces have been created for the innovative future ahead for Seiko watchmaking. Lightweight with strong looks, within a super hard coated titanium case and bracelet, under dual curve sapphire glass crystal is a blue-grey dial. It showcases a vertical subdial layout and horizontal line pattern. This model has its own contemporary feel, with its sleek lines, slim profile, and compact, angular design it has an almost seamless flow from the case, through the lugs and to the bracelet. This piece was designed to have a low centre of gravity, making comfortable on the wrist. The five-piece bracelet is crafted from titanium for lightweight wearing. It has a micro-adjustable clasp feature. The caseback has a three-dimensional globe symbol. It features a new in-house 5X83 solar-powered movement, that not only charges efficiently, but also features a 1/20th of a second chronograph function for measuring elapsed time. The subdial at 12 oclock is for the chronograph feature, the subdial at 9 oclock for setting modes, and the subdial at 6 oclock for a dual-time feature. Seiko Astron: the worlds first GPS solar watch powered by light, automatically adjusted to your exact time through the latest satellite technology. Product Features: Gender : Men Movement : GPS Solar Movement Type : GPS Solar Calibre : 5X83 Accuracy : 15 seconds per month (without receiving a GPS signal and at temperatures between 5C and 35C ) Power Reserve : Operating for approx. 6 months (when fully charged), power save: approx. 2 years Case : Titanium (Super hard coating) Case Size : Case Diameter : 44.1 mm Case Thickness : 14.4 mm Case Length : 50.0 mm Lug Width : 14.0 mm Case Shape : Round Dial Colour : Blue Water Resistance : 10 bar Clasp : Three-fold clasp with push button release Glass Type : Dual-curved sapphire crystal Band Material : Titanium (super-hard coating) Band Colour : Steel Function : Automatic hand position alignment function, Chronograph up to 12 hours in 1/20 second increments, Day display, DST (Daylight Saving Time), Dual-time function, Function to prevent the GPS signal reception (in-flight mode), GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment), Overcharge prevention function, Perpetual calendar to the february 28, 2100, Power reserve indicator, Power save function, Reception result display function, Satellite acquisition status display function, Time transfer function (Switching between the main-dial and sub-dial), World time function (38 cities)