. . probably not a good choice for a sound sleeper . the alarm on this clock be not very loud . I measure it at 75 db at a distance of 1 foot from the alarm -lrb- use  the sound meter  this would be forgivable if the alarm be persistent , but it shut off after one 1 minute of operation . the light be ineffective ; you will not be able to read the time on this clock in a dark room without a external light source . in addition , this alarm use a 1.5 v button style battery , a form factor that might be hard to locate in a pinch should it run out on the road . avoid if the user be a heavy sleeper ! better than no alarm clock at all ... but barely .