wey-sonja8 months ago000Hello everyone. When the unit switches on, it vibrates and makes an annoying sound. Is this normal?Show in original language (German)brunnercoach8 months ago • purchased this product000purchased this productHello Wey-Sonja, in my case the device runs without any annoying sound and does not vibrate. I'm sure you've already checked whether it's standing firmly and stably on the base. Show in original language (German)Comment