https://www.pacrad.com/shure-ua874-active-directional-antenna-ua874us.html
Shure UA874US Active Directional Antenna 470-698 MHz UA874US - PacRad
Directs a Cardioid Pattern Toward Target. Four-Position Gain Selector Switch. Low-Noise Signal Amplifier. Makes Up for Coaxial Transmission Loss. Integrated ...
directional antennashureactivemhz