Designed for professional use with a design nod to the 1989 Promaster Sky, the 30th Anniversary PROMASTER Satellite Wave GPS, is all that and more. Within the diamond-like carbon (DLC) + MRK coated Super Titanium™ case and bracelet lies a multi-layer black dial. Features include satellite timekeeping technology with synchronized time adjustment in 40 time zones, a 1/20-second chronograph that measures up to 24 hours, a perpetual calendar, dual time zone, an alarm, a daylight savings time indicator, a UTC display, a power reserve indicator, and light level indicator. Limited to 3,000 pieces globally with custom 30th Anniversary caseback. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery.