Test the extremes with the CITIZEN¨ PROMASTER Tough series. Living up to its name, this timepiece features a monocoque case (2 piece construction resulting in no caseback) providing extreme rigidity and shock resistance. Shown in a stainless steel case and bracelet coated in CITIZEN¨'s Proprietary Surface Hardening Technology (Duratect), making it harder and more scratch resistant than stainless steel. Other features include an anti-magnetic movement, anti-reflective sapphire crystal, and luminous hands and markers. Featuring our Eco-Drive technology Ð powered by light, any light. Never needs a battery.