MTP41S-UN is an ultra-compact bodypack transmitter designed for professional wireless microphone use. It features Wisycom’s Ultrasonic Narrowband (UN) technology, including a dedicated 70 dB ultrasonic filter and switchable NB/WB operation. The NB mode uses half the bandwidth and yields up to 3 dB uplift in sensitivity, while wideband mode remains compatible with legacy receivers. It is powered by one AA cell and offers LEMO or Microdot input options with ENR/ENC processing for clean audio.