The VX-900 series portable radio is no longer manufactured, however accessories and replacement parts may be available. Please contact your Vertex Standard representative for additional information. Vertex Standard – VX-900 VHF/UHF Portable Radios. The VX-900 gives you the reliability and dependability you require, built to meet the punishing test procedures of MIL-STD 810 C, D, & E, as well as the highest-level Intrinsically Safe rating. With a Weather Sealed mic connector, built-in Noise Canceling Microphone, and a loud 700 mW audio output stage, this very capable and rugged package is ready to serve your communications needs.