this be really a great little alarm clock . I have have mine for 11 year now ! -lrb- bought it while travel in New Zealand . have another I buy in Singapore but the control be not as easy to manage so do not use that as much . -rrb- in the 11 year I have change the battery I think only once -lrb- maybe twice at most -rrb- - it use a watch battery . I like the fact that display 24 hour time be a option . when you close the stand\/cover , the snooze\/light button be the only thing accessible - perfect for reach out and silencing quickly . it be small and easy to carry in a pocket . it be loud enough to wake I when I be tired and not so loud that it be annoying . in the time I have have it I have sleep through it only a few time -lrb- when I have 3 hour sleep or something -rrb- - and I be a very sound sleeper , with short night a hazard of my employment many time . the only problem I have have with this , be that now after 11 year the setting slider be wear out . they use to `` click '' into place -lrb- i.e. alarm on\/off -rrb- , but now they slip out of position and unless I carefully position the alarm button it can be go off on the weekend for I . thus , time to get a new one .