I have a part for my daughter ordered because she has always her cell phone connected to a cable from the amplifier to listen to music via YouTube, the charging cable from the phone then went in a different direction to an electrical outlet. Stripping across's room ....... The thing of this Bluetooth Streamer the past. Unwrapped, plugged in, turned, clicked this receiver in the Bluetooth settings on the phone - and running! Without any lag! I tried also with iMac and MacBook Pro, iPhone, etc., everything works immediately. For audio quality I can find no significant difference compared to a direct cable connection to the amplifier. However, it may consist of only one active connection. That means if you want to connect another device to the receiver as the currently connected, then you must first disconnect this active link. Only then the receiver is available again for a new coupling. If in fact Bluetooth standard, but it should be said. Class part, works immediately, and by a thick load-bearing wall with 45cm, is small and does not have to be visible erected - for example can be hidden in a closet, or behind the TV / amplifier. The required connection cable incl. Power supply are included. Clear recommendation!