The MTH400 is a wideband handheld transmitter designed for professional wireless microphone systems. It offers up to 232 MHz switching bandwidth across 470–952 MHz variants, with an intermodulation cancellation circuit for robustness against self-interference. The ergonomic aluminum body is powered by two AA cells (alkaline, NiMH or Li). Battery life ranges about 11 hours at 50 mW and up to 14 hours at 10 mW. Setup is via OLED, with one jog wheel and four control keys; compatible with MCM premium condenser heads.