VocoPro Black (UHF18O) One UHF wireless handheld mic included. Available Frequencies:. UHF-18 M: M / UHF-18 N: N / UHF-18 O: O Operates as a stand alone unit that can plug into. any system with a 1/4" input, or as a plug in. module for the SOUNDMAN, CHAMPION-RV or HERO-RV Shipping Weight: 3 lbs. FCC license may be required