Adds Bluetooth(R) to most vehicles; GateWay(TM) upgrade allows user to accept & place calls from iPhone(R), iPhone(R) 3G/3GS & iPhone(R) 4; ; Pairs up to 8 phones; Caller ID; Remembers previous incoming calls; Supports A2DP streaming audio (except 1st generation iPhone(R)); Separate microphone, hands-free, ringer & A2DP volume adjustment; Phones running iOS(TM) 4 require firmware revision 1.225.33 or higher; iPhone(R) 3G requires 3.0 OS or higher; Caller ID displays on factory radio display; Must be used in conjunction with the GateWay(TM); Not compatible with 2009 & up Ford(R)/Lincoln(R)/Mercury(R) vehicles equipped with navigation, 2009 & up F-150s equipped with factory satellite radio & Honda(R)/Acura(R) vehicles equipped with XM(R) NavTraffic(R);