The Launch X-431 Heavy Duty Truck Add-On Module turns the company's Pad II into a full-function heavy duty truck scan tool. The module provides access to Class 4 through Class 8 vehicles, and communicates via Bluetooth, or can be hardwired to the vehicle. Users can download the HD Truck app to work on 12V or 24V systems. The module offers extensive model coverage and special functions, including engine, transmission, ABS and auxiliary from manufacturers such as Wabco, Bendix and Allison. The module works on CAT, Cummins, Detroit, Freightliner, Fuso, Hino, International, Isuzu, Kenworth, Peterbilt, Sterling and Volvo.