Grounding Style 1 Clamping Ring Plug | Grounding Style 1 Receptacle With Aja Mounting Box | Controls 5 a Fan. Rotate On/off; Rotate to Adjust Fan Speed. Fully Variable (For Use With Multiple Ceiling Paddle or Exhause Fans). Factory Set Minimum Speed | For Reverse Service (Generator Applications); Grounding Style: Shell Only; Designed to Supply Power to Portable or Fixed Electrical Equipment Such as Motor Generator Units, Welders, Pumps, Compressors, Cellular Relay Stations and Similar Apparatus; Ideal fFurbay Electric Supp