Hab unwrapped the thing and insert the supplied batteries and wanted to turn it on. Nix teamed. Did it ever return because I thought it was broken. Then I noticed but there are settled no normal batteries but NiMh batteries must be recharged only course.
Function is wonderful.
No more odors detectable in 270 liter refrigerator. Only the typical ^^ ^^ smell ozone remains but one can not describe is perceptible in the refrigerator. But the smell is not annoying and if you do not put your head in the refrigerator one notices him at all.
All in all, lay a great device for people who sometimes open meat or cheese in the refrigerator and do not want that the odors mixing.
Addendum after 6 months:
Batteries last about 5 weeks, and the device operates as good as on the first day.
Regards