Summary: This is a nice product. however Kicker completely leaves out the fact that the Zune HD radio cannot play using this device. The product was made before the Zune HD was launched in 2009 so it is not Kicker's fault entirely, other then they knowingly state it is Zune HD compatible..It is to a point. Firstly, many of the ZK500's on sale do not have the firmware needed to function out of the box. Of course you won't know that until you get it home.