PROMASTER ALTICHRON: Climb to new heights with the Promaster Altichron. Designed with CITIZEN's light power technology, the sky is the limit when wearing this innovative, sleek yet sporty timepiece. With an altimeter measuring from 1,000ft - 32,000ft, compass and date, its the absolute timepiece for any semi-professional adventurer. Featured with a brown ion-plated stainless steel case, comfortable black ballistic nylon strap with brown calf inlay, bronze-tone ion-plated stainless steel rotating bezel and complimentary black dial. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery.