Yes, Steve, you can select normal paddle, reversed paddles or hand key inputs in the menu, and it's the same size connector the K2 uses - a miniature stereo plug on the key lead. Ron AC7AC -----Original Message----- Like other Elecraft rigs... can you used a SK on the KX1? I'm also assuming an external paddle (i.e. non-Elecraft) works, yes? What plug size is used for the key/paddle? Steve aa8af