Like new scan tool made by Rinda Technologies. Comes with the adapter 94006 which fits 496 ho and others.

MerCruiser Scan Tool

Developed in conjunction with MerCruiser engineers, this self-contained diagnostic tool displays complete EFI system information allowing you to quickly pinpoint engine related problems. The tool performs a complete range of EFI system tests and also contains a built-in programmable fuel injector tester. This tool is the choice of MerCruiser and independent marine dealers worldwide.