according to crutchfield
http://www.crutchfield.com/S-pySLbPN...fo&i=020VRX935

The VRX935VD will control an optional SIRIUS Satellite Radio tuner, giving you the chance to enjoy 100 streams of music, news, sports and entertainment (antenna and Sirius subscription also required).

does that mean I only need to buy the antenna and subscription for it to start working?

thanks

you still need the tuner box, but you can use the VRX935 to control it.

you need the tuner antenna and the subscription