Bought myself after much consideration this miracle part. Wanted I have a Tischventi for the office. Prerequisite USB port and cool air. These are fully met. However, the part pipst so much that my colleagues after 30 minutes required to make out the part. Really unbearable. At the highest level the sound is not quite as loud but still it is not ertrgälich in the ear. But since me interressierte also the air purifier I once let the Gerätmal secretly run into a room where there are no colleagues to stop. Result: no significant changes.
