I have the device but only verblüft only a quarter but I'm just. That which most importantly it is with is gelifert the microphon the dan all speakers after empfernung where they stand kompfigurirt and thus the optimole set sound that saves much herrum Try. The device is, however, also be controlled with a smartphone with the Yamaha app you need only look for Gamestor (Yamaha AV Receiver) that funktionier but only dan whom the AV Receiver to a wireless modem connected to a LAN cable, but with whom he dan LAN is connected and the mobile phone is connected via WLAN is kan be regulated not only volume over the phone but also the music that you have on the phone to play the range is where you stop receiving the mobile Wi-Fi in the house yes that was actually the review of me vll I make another video and add it on Youtube but I think for the price is perfect.