The Sony WRT-820A is a professional-grade UHF bodypack transmitter, renowned for its exceptional audio quality and robust, reliable performance in demanding wireless microphone applications. Part of Sony's acclaimed Digital Wireless System, it operates on a synthesized UHF platform, allowing users to easily switch between a wide range of frequencies to avoid interference and comply with local broadcast regulations. The transmitter is designed to integrate seamlessly with Sony's companion receivers, such as the SR-RX400 series, and features a high-precision digital audio processing circuit that delivers pristine, clear sound. Its rugged metal casing ensures durability for broadcast, theater, and live event use, while features like a backlit LCD screen, adjustable output power, and support for plug-on transceiver functionality make it an incredibly versatile and trusted tool for critical wireless audio transmission.