Kenwood KCA-BT100 Wireless Headset "incoming voice tech phones" Questions

voice for dialing. I cannot have a conversation there is no incoming sound at all.The phone work with a Motorola T305 bluetooth hands free cap speaker. Is this unit defective or a setup problem? I had

...voice-guidance from the satnav): you just hear nothing. However, ringing works; I believe this is coming from the phone, as well as the Kenwood beeping to announce an incoming call. the problem is on ...