I have the old version of this for my kids, and it's amazing. The noise level is good and you have a variety of white noise options. I bought this version for my parents' house for when my toddlers sleep over. This one has an auto-off feature that cannot be shut off. When the machine shuts off, everybody wakes up. It's plugged in, so it's not draining batteries. It just needs to be able to stay on all night.

I stayed at a hotel not to long ago that had these in the rooms. I've been hooked ever since!

I bought this since I was pregnant. It really helped me to got sleep and when my baby borned too!!! I don't remember the cost.