The PSC RF Multi SMA contains two, separate, active 1 x 8 RF splitters for use with up to eight diversity receivers. This compact, rugged device was developed using the latest super low noise RF amplifiers and will operate over an extended frequency range of 470Mhz to 870Mhz. Its two inputs are traditional BNC connectors for ease of use in interfacing with your external antennas. Each of the SMA outputs offers a typical isolation factor of 24 to 28dB between radio receivers. The PSC RF Multi SMA also has the ability to power external powered antennas or remote line amplifiers. There are two top panel mounted switches on the unit. One is marked "POWER" and this controls the overall power to the unit. The second switch is marked "ANTENNA" and this switch controls the power being sent to an external powered antenna or remote line amplifier. Both switches light up when in use. The entire unit is powered from any source of external DC power of 10 to 15Vdc @ approximately 90 mA.