Sennheiser EK 500 G4 Pro Wireless Camera-Mount Receiver GW1:

The black EK 500 G4 Pro Wireless Camera-Mount Receiver from Sennheiser is the latest addition to their evolution series of wireless receivers. It operates in the UHF frequency range and can be used with a companion transmitter and microphone (sold separately), as part of a wireless RF transmission system for live stage, theater, film, video, and presentation applications. The camera-mount receiver—with adaptive diversity technology—features 2000 frequencies and is tunable in 25 MHz steps. There are 20 fi...