The UF series of UHF wireless microphones provides 64 selectable channels, and is available in single channel, dual channel, and diversity configurations. Each unit in the UF series provides excellent sound quality, with extremely low noise transmission and reception, and uses PLL circuitry for accurate frequency selection. Up to 10 channels can be used simultaneously with multiple systems, and all UF mic systems come with a 19-inch rackmount kit (except for UF-8264, which comes with a ABS molded plastic carrying case).All wireless system items can be purchased separately - FM-64 handheld uni-directional dynamic microphone with rechargeable battery input - Metal adaptor included for 19€ rack mounting (2 units can be mounted side by side in a 19€ rack) *UF-8264 is not rack mountable