No separate device is given. Apparently only the TS+ HD boxes have the ethernet port, so at this point of time only those with these boxes are eligible. As regards this 'preview', I guess they will just call you up directly. My best guess is you should get a call if you either have subscribed to their costlier packages or if you have been a long time subscriber. In my case I fall into the latter, and hence I got a call regarding this within a week of installation of my TS+ HD box. You may call them up and ask. Right now there are no fees whatosever, neither for the cable, nor the visit, nor installation nor viewing.