decibel door by huanggaoxiang huang from china

In the life, we usually will take place after openning the door will appear the unexpected affair, because of the countercheck of the door, to the interviewee's appearance not clear, thus make everyone very embarrassed.
This is a door of cleverness, pass to our different and mental appearance descend send out of voice of decibel size, carry on the record.Our mood change or a little bit other circumstance but on the door manifestation before the one who come out, at come to visit will soon enter our personal space have the preparation, avoid the embarrassed storage on the chip.