When my cheap Chinese controller for my Berkliner went south I could not fine replacement parts. Eventually I called Medicalcentersupply and they were able to figure out that I needed a kit that bypassed the control box and plugged into motor. I had to trim the plug a little but it works great. It came with a transformer, and wire with a small pin and flat blade connector and the hand control was a okin type. I hope this saves someone some grief?