Relacart R-12S Antenna DividerFrequency range: 400MHz-1000MHzAbatement: -3.5dB, ±1dBIsolation: >-20dBR-12S can separate 1 RF signal to 2 RF signals output or cimbine 2 RF signals to 1 RF signal output.Also it is a RF signal amplifier can transfter the offset voltage to front,is a idea..