Thanks for above review. It was the third time I brought an air purifier and yes I agree, Gliese did not disappoint me like the other two from Philips before. Garbage they were, garbage. I wasted too much time and money hoping one day the silly unit I tool from Philips will work at all. My grand father has chronic asthma. Nothing helped. Gliese comes with meaningful functions yaa! The car purifier unit makes sense from Form, Function and price POV. Agree!