The Sony UTX-B40 is a professional wireless bodypack transmitter designed for use with UWP-D systems, offering stable UHF analog transmission enhanced with Sony's digital audio processing for clear, natural sound. Operating in the UC14 band (470–542 MHz), it provides up to 2772 selectable frequencies with auto-scan and NFC sync for fast setup. The included ECM-V1BMP omnidirectional lavalier mic delivers intelligible speech capture, while selectable 5/30mW RF power supports reliable performance at ranges up to 330'. With a rugged all-metal housing, high-visibility OLED display, switchable mic/line input, auto-gain mode, low-cut filters, and up to 8 hours of runtime on two AA batteries or unlimited USB power, the UTX-B40 ensures dependable operation in broadcast, ENG, and live production environments.