reiner.imhof.shop5 years ago+110the unit can also be used without liquid for cleaning hearing aids.Show in original language (German)SchinkenKäseToast5 years ago+110No way! Is a water bath. Unsuitable for hearing aids, mobile phones and hair dryers.Show in original language (German)CommentAnonymous5 years ago+110no, water is necessary for all ultrasound devicesShow in original language (German)Comment