Emergency situations require that first responders have adequate communications inside buildings. EMR Corporation provides VHF and UHF bi-directional amplifiers that can be the backbone of an effective distributed antenna system (DAS). The 860622/B(72) is a 60dB gain VHF repeater with 37dB of composite output power. NFPA Compliant. This unit covers 700 MHz FirstNet frequencies of 788-793 UL and 758-763 DL.