It's an audio range scope (<20KHz). Pretty expensive for that. I think that you can get modules that will drive a computer, or even mobile device (like a phone or tablet), for cheaper, and with more bells and whistles.
But Korg makes good stuff.
But Korg makes good stuff.
Then again, I've mostly been looking at vector network analyzers lately so ~$200 for electronic test equipment for professional use seems laughably cheap to me.
Under $10. Search for "DSO138".