Operate the dice with most iPhone 5s and sometimes also on the PC via Belkin Bluetooth Stick. On both devices, the connection is established quickly without problems and also maintained properly. Design and manufacturing are absolutely price justice. Sound is OK, you can not expect in the price range. Very good is also in the quieter area is heard no noise or crackling, as has the small cube a very good sound and for my purposes, so a little music in the background, he is more than adequate. More I have not tried.