Compact Cross-needle VHF & UHF 150 watt Power SWR mter for 140Mhz - 525Mhz. Illuminates if hooked up to a source of 12Vdc. 15W or 150W selectable scales. Cross-needle display. SO-239 Antenna & radio inputs accept regular pl-259 connectors.  3.35" x 3.45" x 3.75".