Built to exceed the exacting ruggedness specifications of the U.S. military, the VX-131/132 are constructed using a die-cast aluminum chassis, along with an impact-resistant composite plastic case to ensure years of reliable operation. Knobs and switches are crafted for easy access, yet immunity from accidental bumping of critical controls.

The VX-230 portable was designed and built to meet 11 different Mil-Spec standards covering Mil-Std 810 C/D/E/F.