Classic style can set you apart in this high-tech world. Bright green rings encircle the dial, bezel & crown. This 1/5 second chrono in black ion plated steel measures to 60 minutes, with 12/24 hour time, date, luminous hands, WR 100M & a 40.2mm case. Drive’s pierced metal design repeats on the dial; the crown’s “D” completes this edgy look. From the Citizen Design Studios, Drive from Citizen Eco-Drive is fueled by light, any light, so it never needs a battery. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B612.