The Astron GPS Solar watch features a 5X83 caliber with a precision of ±15 seconds per month without receiving a GPS signal. It has a power reserve of approximately 6 months and several advanced functions including a perpetual calendar, world time function, dual-time function, and GPS signal reception function. The case is made of titanium with a ceramic/titanium bezel, and it has a dual-curved sapphire crystal with super-clear coating.