Help identifying vintage "test?" gear - Pocket Sampler, Dick Smith, K-7345

[Webserfer]

Found this when going through boxes of old stuff. Cost me basically nothing so got it as a curiosity as the parallel port and round connector intrigued me.

I first thought given the round connector it was something for old tv signal testing or something. Some googling turns up nothing on this specific unit but did find some maybe similar kits that might make it some kind of voltage monitor or very basic oscilloscope?

Honestly my in depth tech knowledge is very limited so looking for any help on this.

If it is a oscilloscope/voltage monitor where would I even start in finding software that would be compatible with it?

Any help or advice on what it really is/how to use it or if its even worth using would be appreciated.

3 images of it should be attached.

[beanflying]

Google is your friend  http://www.alanyates.com/eapsampler/