The JVC DFA1 consists of an adhesive element which sticks to the windscreen of a vehicle and a cable terminated at one end with a minature BNC connector and the other by a small self adhesive oblong block with two sprung connections on it.
The element is "L" shaped and the longest leg of the "L" must be mounted vertically.
When stuck to the window, the aerial looks similar to the heating element in a heated window.
Please check that your car does not have a coated windscreen that may affect the reception of your DAB radio. If this is the case you can install an external DAB aerial.