... pocket calculator whichstands for real lightness.you can slip it into your purse or wallet,it is asbig as a credit card ... this makes it the " energy saver" it will be your good lift assistandapplicable places;when purchasing goods,you might want to calculate it ... partners or accountants,it isa gorgeous choice to have this as busienss presents,color: blue,black,green,pink,red.size:54mm x ...