my sister have this alarm clock . I love it . the sound soother be awesome , and lull I right to sleep . I want to get my own . I order it from Amazon , and it arrive quickly . I be excite , and set it up immediately . when I go to bed I put on one of the sound , awesome . then I notice a humming noise amid the soothing wave , I fall asleep anyway . I wake up to the alarm clock go off , and promptly hit the snooze button . there it be again ! the humming noise stay on the whole time it be in snooze mode . I decide to exchange it for a new one ... the new alarm clock arrive . the same thing happen . I call up customer service . I speak with a very nice representative who be sympathetic to my situation . she decide that since this happen more than once , this be a matter that need to be investigate . she tell I that she would take Amazon off of the merchant list for this product until someone have test all of the remain stock in the warehouse . she tell I to check the website in a couple of day , and if I see that Amazon be sell it again , that mean the matter have be resolve . she also issue a immediate refund to I . I be very impressed . a few day later I check the website . sure enough Amazon be sell the alarm clock . I go for it . I figure third time be a charm , they look into it after all . I receive the alarm clock not so quickly this time . I decide to set it up , and test it out before I commit to fall asleep with it . sure enough , it make the horrible humming sound . I send it back . I also call customer service again to give they a head up , since they be so accommodate the previous time . another mistake . this customer service rep be unsympathetic , and actually say something along the line of ` well I could not say it be malfunction ... ' do . it be be send back , I be not go to keep try . I 'll just be envious my sister 's alarm clock that work .