A friend gave me this to see if I could track down some information on how to use it, because I'm an "expert" (hah! more fool him!). It's a small ESC, attached to a 280-ish sized motor. It has the usual battery and receiver inputs, but it has two wires going to a JR-style female connector. I assume that extra lead is for an arming switch, and that it needs a switch closure to turn things on -- but I don't know, and neither does my friend.