Citizen Axiom's refined yet sleek tank design offers a day-to-night fashion option with edge-to-edge glass design for the modern trendsetter. This timepiece, with Eco-Drive technology, features a 15 x 28mm black ion-plated stainless steel case and bracelet with a black dial. Featuring our Eco-Drive technology - powered by light, any light. Never needs a battery. Caliber number G620.