Hello Lela, I bought those CDs at MIAO (www.miao-group.com) in Causeway Bay and I just bought another CD today for myself which is for relaxation, it is $530 each and now if you bought 2 CDs, MIAO will offer a $50 cash coupon.
I use this kind of CD for my baby and myself, it works magically, our sleep quality is so good....my baby sleep from 10pm to 7am every night and I really like this CD.