I bought this based on reviews ive read on amazon and i have to completely disagree im concerned about the quality of this diffuser and the parts supplied with it the one i have been sent and am returning hardly gave any mist and only produced the mist intermittently however when i tried it with another ac adaptor the flow of mist was too much i just read that there are 2 different mist settings i didnt know this only a difference when i plugged in a different adaptor then there was so much mist the top of the unit and surrounding areas were wet