Unfortunately, he makes relatively loud noise when a CD player. We bought 2 units, one for each child. Both make this rattling noise during play CDs. Just between individual pieces is almost reminiscent of the steady sound of crickets. When the children hear CDs softly to sleep, then this noise is clearly heard even during the music.
One of the devices was so far that were added loud Quitschgeräusche after 4 months. So we exchanged about it and received from Amazon without any problem a replacement unit. However, this has the fundamental Zirpgeräusch again.
