UHF (540-565 MHz) in-line antenna boosters (pair) increase RF signal strength (10dB/3dB gain switch) to compensate for antenna cable loss. For use with Audio-Technica UHF receiver models AEW-R5200, AEW-R4100 and with the ATW-DA49 and AEW-DA series antenna distribution systems and other devices providing 12V DC antenna power.