This arm-mounted mobile computer allows warehouse workers to more efficiently fulfill orders. It consists of three devices: a computer terminal, a barcode scan ring and a hygienic arm-mount holder. The oversized trigger on the barcode scanner reduces fatigue, and because of its unobtrusive profile, it won’t interfere when lifting and transporting boxes. The use of spacer fabric for the arm-mount holder allows the arm to breathe, and a stainless steel and plastic frame provides the necessary rigidity when attaching and removing the computer terminal. The large graphic display on the terminal ensures fewer mistakes, while an embedded radio automatically communicates tracking data to the warehouse, enabling rapid, just-in-time movements of inventory. Customers have reported a 30 percent increase in productivity after deploying the WT4000.