It can diagnostic the following trucks:

CAT,MAN,Cummins，volvo,Hino

VCX HD(VCX Heavy Duty) is designed according to industry standard of RP1210A/B, it is PC-to-vehicle interface compatible with multiple software applications, it is available to diagnose most of heavy trucks, Buses, Grabs, Cranes and Engineering Machines for minimizing your investment in multiple brand-specific diagnostic interfaces. 
Features：
Industry standard RP1210 A/B compliance 
Flexible configuration supports USB wired and 802.11b/g WIFI wireless connectivity
Adapters and cables self-determination for molding, durable and facility usage 
Support 12V and 24V vehicles communication, Available to diagnose heavy and Light trucks
Protocol coverage for automotive to heavy duty vehicles: 
    CAN - J1939/CAN125/CAN250/CAN500
    2nd CAN - J1939/CAN125/CAN250/CAN500
    J1587/J1708
    J1850
    ISO9141
    ISO14230
    ALDL
  CE and FCC compliance for hardware
  Firmware Updatable ，Keep improving

Software Specification：
  VCX HD provide driver program compliance with industry standard of RP1210A/B
  VCX HD is a standard reprogramming tool of Pass through, ECU reprogramming online can be realized.
Compatible Software：
  CAT ET2009B(Electronic Technician)
  Cummins Insite
  HDX(HINO Diagnostic eXplorer)
  VCADS Elite Mack/Volvo
  Allison DOC for PC
  Bendix Acom Diagnostics
  Meritor WABCO PC Diagnostic (Toolbox)
  Detroit Diesel Diagnostic Link (DDDL)
  Man Cats II Diagnostic
  International MD