Have owned and used this tool since Mercury released it. It has a couple of pixels that do not completely work. If you look close in the pictures you can see them. It has been this way for as long as I can remember. It never effected its use in anyway and never has gotten worse. You can still easily read the display. The unit includes the power and connection cable 84-822560A 5 and the 4 pin adaptor 84-822560A12. Also included is the data cartridge 4.1 software version 4.1 Outboard ECMs with technician reference manual.
The Software Cartridge 4.1, 91-822608  5 that comes with the DDT covers Outboard Only: • 1982 and newer 2, 2.4, 2.5, and 3.4 litre Hi-Performance fuel injector test. • 1994 and newer 2, 2.4, 2.5, litre EFI standard and Hi-Performance outboards. * • 1994 and newer 3 litre outboards. • 1997 3 litre DFI outboard. • 1998 and newer 2.5 and 3 litre Optimax. • 1998 and newer 25-40 hp 4-cycle outboards. Depending on what engine and what process you are doing you may need different attaching cables.

Also included Smart Craft engine Diagnostics cartridge 91-880118-2 which covers:   
 200 DFI JET DRIVE (POWERHEADD) - 0E384500 THRU 0E435741 200 DFI JET DRIVE (PUMP) - 0E379931 THRU 0E428850  
200 DFI JET DRIVE (PUMP) - 0M954922 THRU 0M964698
MerCruiser Diagnostics 2.0  also included covers: Software Cartridge 2.0, 91-803999 ªMerCruiser Onlyº • MerCruiser EFI (TBI) and MPI products with MEFI-1, -2 or -3 ECMs. Can also read RPM history on 1997 and later Thunderbolt V.
The Technician Reference Manuals that are included with this unit have part numbers and illustrations of the cables required to complete the testing of the different cartridges on different engines.