JVS to Jamma converter. What does it do?

Riverservice sells a JVS to Jamma converter. I was just wondering what it's used for. I'm not familiar with JVS.

http://www.riverservice.co.jp/031201j_originalgoods/040331originalgoods.jpg

Actual website: http://www.riverservice.co.jp/index_e.html

I think its for a Naomi or one of the other boards that use the Sega I/O. How much is that? I could use one of them.

The covertor allows you to play Jamma games on a JVS wired cabinet such as the Naomi Universal and Net City. Initially, I thought of using such a convertor on my Naomi Universal cab but instead chose to splice a Jamma harness into my JVS harness. I now have the ability to play both Jamma and JVS games on my Naomi Universal.

Thanks for the answers.

As far as price, you have to email river service to get prices.