If you own the JVC KW-NX7000 navigation receiver, then you know exactly how great it is. Now you can get even more out of the receiver with the JVC KS-U21. The adapter is used in enabling the receiver to get HD Radio.
RDS Traffic Tuner Connection Adapter Cable for JVC KW-NX7000
Antenna splitter with built-in noise reduction
Used in conjunction with the JVC KT-HD300 to provide high quality digital sound that HD Radio offers
I have owned this product since May 2009 and enjoy it each time I drive. Here are my thoughts.
Do not use the traffic part of it. Tried it after the initial install and it seemed to work fine. I just do not travel that much.