From what I'm gathering it appears to only be a tuner. It doesn't look like it has the ability to record to a computer HDD. So if you wanted to hook up a STB to it (which you could using the HD input) it would kind of be pointless because you could just hook up the STB to the TV to the same effect. Seems to be targeted to devices that you can't hook up a TV signal to. Like a computer monitor.