Yeah, I remember those from about 10-12 years ago. They were a product sold through MLM. One of my ex's demo'ed one for me. All hardware, with a proprietary "black box" with embedded processor and PROM, cables and headset.

Supposedly did the improved brainwave thing. All I got was a headache.

Oh, yeah, and they sold for about $500. So the price has dropped, but not much considering.