For a doorbell quite large format. The sounds or songs you want to hear can only be transferred to the PC and be converted into a quite modest QUALITY does not speak for this Klingel.Ein slightly larger memory would have done wonders here. Songs or sounds must be converted to the contained in the doorbell program and plays There is no adjustment for the bit rate. I appreciate it to no more than 64 kb / s and so it sounds. Would not buy again.