More than a timepiece -- it's technology!  This Eco-Drive Citizen's men's watch converts any source of light (natural and artificial) into usable energy to keep your watch charged an running properly.  When fully charged, it will continue running even in total darkness for six months.  Properly maintained, it will never need another battery.  Attractive silver link band.  Comes impressively boxed with manual and CD.  What a great Grad or Dad present!