Please do not spread out false information. This keyboard uses outemu blue switch which is one of the loudest switch you can get for a mechanical keyboard. I guarantee you if you are in the meeting with someone no matter how quiet you try to type they will still hear it crystal clear. At night, I promise your wife/partner will get angry at you and tell you to throw it away the next day.
If you are looking for a quiet switch then I would suggest either brown or red, but red can take some time to get used to its linear feedback.
If you are new to mech keys and want a quiet keyboard, you should skip all the blue switch no matter how cheap they are. Don't end up buying them because of the sale and then later become frustrated and return it.