Thank you for viewing. This is an early model engine starter for a Car Mate JB23. The harness has been modified for Car Mate use. I purchased it at auction about a year ago. It's a simple plug-and-play installation, just connect the harness coupler and ground wire. Anyone can easily install it, and there are no complicated settings. Buying a cheap one without installation instructions is a waste. Operating instructions and installation instructions are different. I will check the item before shipping, so you can rest assured. I will include the installation manual for easy installation, but I cannot provide after-sales support. Thank you for your understanding. Please check the product condition in the photos. Since it is used, there are scratches and dirt, so please be aware of this. No claims and no returns, please.