49 and, while I don't think this is the exact model, it was very much like this:
I think mine had a 2nd knob on each side so you could play "soccer" or "hockey" with one paddle in front of another paddle standing in a "goal". Either way, you didn't have a controller. You sat next to your opponent with 1/2 this thing on your lap controlling your own 1/2, with a long RF cord going to the trusty 13" Black and White TV with rabbit ears and knob channel controllers. It was a nice diversion when you couldn't find anything to watch on the 3 networks, 2 UHF channels or 1 PBS station on TV. This may be, in part, why I over-compensate with too many toys nowadays.