The ALEXA audio guide was developed by ALEXA audio production in cooperation with the research and development corporation INOTEC Markkleeberg. Development, production and marketing of the audio guide are a joint venture of both companies. Many years of experience as radio producers of cultural broadcasts for several ARD radio stations as well as close cooperation with sound engineers, technicians, museum educators, narrators and authors benefit our work. The ALEXA audio guide is distinguished by its outstanding design, its light weight and its excellent technical equipment. These features make the guide one of most advanced self-guided audio tour systems on mp3-basis available. The ALEXA guide is an excellent device for a wide variety of applications in museums, galleries, theme parks, castles and gardens.