I spend several year , off and on , travel independently in Asia , Australia and the Pacific Rim , for month at a time . my constant companion in these travels be this clock . every other travel clock I look at be too big . this one be smaller than a credit card -lrb- maybe half as tall -rrb- . it also have a built-in stand that fold away so you can stow the clock in you pocket -lrb- i.e. , it become a pocket watch of sort -rrb- ; as well as a illumination button for use in the dark , and a alarm that be loud enough to ensure you will not sleep through it -- no matter how tire you might be . this be a simple item , with a few well-marked button and thoughtful design , power by two common button-cell battery . it be also robust ; I be still use mine well after the label have wear off . one day , about six year after I buy it , I hear something clunk in the dryer . when I look inside I find that I would leave the clock in a pants pocket , where it have be wash and dry . the crazy thing be , it be still keep time ! who need Rolex , right ? I would pay about $ 25 for one of these . the fact they be under twelve buck be just icing on the cake . I doubt Casio still make they , though , so buy while you can .