The old cable is plugged onto the underside of the adapter. Then connected to the Iphone. For compatibility, there is nothing negative to report. The adapter fits 100% - it wobbles nothing, only some force when you connect to Smartphone is necessary otherwise we noticed nothing. When practical test then as a positive result, the transmission was smooth and we also did not notice anything when we make the comparison with the previous model of the iPhone.
Here you can see very clearly again that you do not necessarily dig deep into their pockets to find a compatible device. The use of OKCS Audiodapter 8 pin to 30-pin dock adapter was easy, simply plug in between and you have the desired effect. Approximately 9 euros cost of these small items, a good inexpensive option to expensive original products.