The "Smart Adaptor" is not really rocket science but very helpful. Are you using an rca battery at your 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 adapter to your battery pack and then connect any clip cord 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 adapter. The clipcord or battery pack are not included.