I have a similar clock that I buy in Tokyo several year ago . the original be a Seiko that still work but the alarm on\/off switch become loose and can easily turn off r on just by move the clock in the night . I choose this clock because it be very similar . it work as advertise . the alarm be loud enough to wake the heaviest sleeper without be too annoying . if I have to complain , it would be about the size of the display which be smaller than I have hope . however , it be easily read from the bedside .