Bi-Directional Amplifiers (BDA’s) / Repeaters, for the Public Safety sector, is time proven component in a DAS solution, where signal is weak, but usable signal is available outside the structure. These units are available in PS800,700 and UHF/Tetra bands, as well as dual band. BDA’s can be configured in the old or new bands. Also available is a rebandable unit that with a flip of a switch will shift the frequencies from old to new. These BDA’s are available in various power and gain levels.