It all works fine, and comes with everything pictured. I bought the antenna to boost the signal for the converter box. Those two come with original boxes and instructions that came with them. I've only had them for a few months.
Converter box: $20

Antenna: $5


Sound system: $15


BUY IT ALL TOGETHER for $30!!!
(That's a good deal. I paid $35 just for the converter box!)
(That's a good deal. I paid $35 just for the converter box!)