HomePortable RadiosVX-520Text Box: VHF/UHF Portable Radios Rugged, Durable Portables Ideal for Factory or Fleet! Text Box: The VX-520 expands on the success of our VX-510 portable. With 32 channels, raised guards around function keys, a programmable three position toggle, reinforced PTT cover with raised dimple to positive PTT confirmation, Priority Scan, and a 11 hour battery life rating, the VX-520 is the choice for heavy duty, everyday on the street use.