RBK302 is a portable fixed-base unit for the RPU 300 reportage system, delivering broadcast-quality audio via a true-diversity receiver and a dedicated intercom talk-back channel. The standard assembly includes MSR 918 (VHF/UHF RX module), CST 910 (UHF TX module), PSS 902 mains power supply, and RPT 923 portable minirack. Main RX supports 16 switchable frequencies in VHF 150–250 MHz or UHF 470–880 MHz; talk-back TX covers 16 UHF frequencies 400–520 MHz.