I have an LCD panel in the car and a set of composite inputs. What do I need in order to be able to mirror the iPad screen? Is this (http://www.ebay.com/itm/RF-AP300-30...ultDomain_0&hash=item19c9e20a2d#ht_2075wt_754) enough? Is there any difference between this and the one available from Apple directly? Do I need any specific software?