The "Smart Adaptor" is not really rocket science but very helpful. Are you using an rca battery at you pen machines but sometimes prefer to use a coil or old rotary with traditional clipcord or even rca? We got the solution for you! Just add the adaptor to your batterypack and then connect any clipcord or Rca cord with a 6,3mm jack to it and then you're good to go. No need to work with your old power supply anymore. This works great! 

This is just the adaptor. The clipcord or battery pack are not included.