Astron GPS Solar Titanium Collection. With the strong, sleek lines of the Seiko Astron, the world's first commercially available quartz watch, today’s Astron is designed for a new generation of leaders, embodying the pursuit of excellence in both innovation and style. Combining solid tailoring with the highest degree of accuracy possible in a wristwatch, this exceptional timepiece is GPS controlled for high-speed time and time zone adjustment to 39 time zones, and includes a daylight saving time function, perpetual day and date calendar correct to the year 2100, and am/pm indicators. The unique time transfer function allows wearers to switch between the main dial time and the dual time sub-dial at the push of a button. To ensure smooth operation, the watch is equipped with a signal reception result indicator and power save function. The solar cell is powered by light energy, with no battery change required. With three-dimensional applied indices and LumiBrite hands and markers for superior visibility, the silver dial is framed by a black sapphire crystal bezel providing subtle dimensionality, shine and enhanced scratch-resistance. Crafted of light and durable titanium, with a super-hard coating for added endurance and H-shaped links for smooth wearing comfort, this superb timepiece also offers a sapphire crystal with super-clear coating, secure screw-down case back and tri-fold push button release clasp. 10 bar, 100M Water Resistant.