I buy this product because of the selection of sound it offer , have listen to the sample provide online . however , the main reason for purchase be as a white noise machine for my night 's sleep . I think it be a good plus that it also come with a alarm clock . while I do appreciate the functionality that you could set the alarm for any sound you wish -lrb- go to sleep with white noise but wake up with wind chime -rrb- , I be dissatisfy with the sound quality of the white noise or the brightness of the display . I could discern the loop in the white noise - it be not continuous or smooth . in fact , I get one of the most restless night of sleep use this machine . overall , if you be look for a sound machine with lot of interesting noise , this be for you . if you be look for a white noise machine this be not for you .