I am soooo disappointed! The Auvisio MP3 doorbell does not work as indicated in the description. From factory from 2 melodies are preloaded and can not be entfernen.Also run the melodies in succession. The selected by me MP3 files wolten not be instaled on the memory of the bell, although these were small enough for the rather small memory. Every time I was annoyed with the instalierten of work files by that they appeared again. What a waste!