The CAT 538 5051 CAT Caterpillar Communication Adapter 3 III Kit This is the newest communication device provided by CAT and the datalink device that will allow you to properly communicate with a CAT engine on dual datalinks. This function is needed for some CAT ET (Electronic Technician) functions. Communication: Allows communication between service tools and engine controls using various data links such as J1939/11, DeviceNet (future release), CAT DataLink, and J1708 (ATA) vehicle networks; Flash program allows adapter firmware upgrades as additional features become available; Uses J1939/11, high-speed data link (part of ADEM III controls), substantially reducing flash times; Automatically selects J1939/11 when flashing the engine (reduces the flash time approximately 80%, from 14 minutes to 3 minutes). Whats Includes: CAT Comm Adapter III CD for installing the drivers USB Cable (From device to your computer) J1939 Cable (from device to your truck) Hard Shell Case with foam inserts. TPX Power Source delivers quality Caterpillar diagnostic tools.