Hi Graham,
Thanks for your reply. The communication kit is a wired solution for connecting to a mobile phone. I am looking for a bluetooth adapter that allows connection to a music player or phone.
If you download the specification sheet for the K450s, you will see it states: "Bluetooth® technology optional. Great sound included. Ideal for use with virtually any portable music player, the new K 450 can also wirelessly connect to your Bluetooth-enabled mobile phone by means of an optional adapter and headset. So you can enjoy your favorite music as you may never have heard it before, as well as make and receive hands-free calls (with our optional communication kit), all through the same system."
It is this optional adapter that I am looking for.
Best regards