http://www.marla-schnee-cosmetics.de/
Who needs it, will find all the information there,
I must comment this one.
I would NOT recommend you this electrologist. I have had a bad expirience with her. She doesnt wash her hands before the treatment even after she smokes and she deosnt use gloves. She is not proffessional either. Many times people just entered the room as I was treated and it seemed to be alraight 
Must say also about that she doesnt do the hair removal correctly - caused scars to me!
who would you recommend in bonn or koln?
I would recommend Ermtraud Feyen; although she may no longer be in business. She stayed with me for a few weeks for electrology instruction and she is very good indeed. She is in Koln.