I be very disappoint in this product . I wish I have not wait so long and I wish I be still able to send it back . the product be very difficult to use without a manual because the button be very poorly label . you would think that it would be a breeze to set a alarm clock that have only time\/day and alarm as its function , not so . there be 4 button , none of they be label hour or minute or alarm . they be label `` mode '' , `` set '' , `` adjust '' , `` receive '' . what do that mean ? it turn out that it be very simple to adjust the alarm once you have the manual ; you just have to memorize all the counterintuitive name . also , note that the alarm clock do not set itself right immediately after you put the battery in . it set itself right of it be volition after a while . sometimes the time-lag before it set itself right be hour . there be a way to set the time manually in the meanwhile , but you do not want to attempt that unless you have memorize the manual . this be a major drawback , if you travel often and you have to take off the battery when you put the alarm clock in the suitcase . I be really befuddle by the fact that with all the alarm clock that be label clearly enough to be set without the manual , this one be not . and I be no technophobe . I be one of those guy that like to learn about all the advanced option in he computer .