This is one of the rarest Naomi games produced according to Capcom Coin-Op. 4-Player Simultaneous 3-D Fighting Action by Capcom brings you some pretty insane battles. 

Complete kit:

• Naomi Motherboard (w/L-brackets for surface mounting)
• Capcom I/O Board (with all required cables)
• Kick Harness (to allow 3rd and 4th player controls)
• 4 Sets of Joysticks/Buttons
• Power Stone 2 Cartridge
• Manual for Power Stone 2 
• Manual for Naomi Service
• Move stickers for Power Stone 2
• Large Marquee for Power Stone 2
• Joystick Overlays (Official PS2) Set of 4
• Official Capcom Control Panel Overlay (Gray w/Capcom logos imprint)
• Capcom Logo Stickers