Jerry G. wrote:

The system is infact designed this way to avoid being tampered with. You
can only have this re-programmed by the authorized service rep for Kenwood
radios. They infact do not support outside service or any outside parts
sales for their products. They will tell you to send them the radio for
service only. Otherwise, no parts...

Woo! Another one for my list...

Definitely want to stay away from this brand!