Stefan,
I have the packaging in front of me (hard to read). Probably a German company.
Durohflusssenson, Modell DFS 2 is the first line.
I noticed a couple of sources for these:
Thank You, Terry,
I found producer - DigiFlow in Netherlands (digiflow@hotmail.com , no web-site).
But price i have is higher than in i-store...
regards,
stefan