The Sennheiser ew 500 BOOM G4-GW Wireless Boom System (558 - 626 MHz) is the professional choice for broadcast quality sound. Providing the highest flexibility for your video sound and field recording applications. A robust wireless microphone system that offers ultimate sound quality, simple mounting and ease of use.The phantom power-equipped SKP 500 plug-on transmitter adapts any wired shotgun or handheld microphone for a wide range of wireless applications, from field interviews to off-camera boom work.