Wow. This was a little project. Relatively simple because you don't have to use a lot of wire. Its the NOS 2.5 lb bottle heater with thermostat. Had to use male/female spade connectors so I can take it off. The directions are great. Comes with connectors, switch, thermostat and wire. I had to take some of the plastic cover off of the connectors because they didn't fit together. My bike has so many wires now, that there isn't much room for anything else.