Product works exactly as described on my Panasonic SAPT480: plug it in, connect with mobile or laptop and play. Quality design with a small blue LED light which indicates the connection status as described. When playing music from the laptop sometimes no perfect reproduction / crackling, from the iPhone does not. Did it before trying a cheaper model of Cabstone (analog output), which was not compatible with my system. This model now works properly! I am very happy with it.