The S4UI from Communications & Power Industries is a RF Amplifier with Frequency 13.75 to 14.50 GHz, Gain 70 dB, Small Signal Gain 0.3 to 1.5 dB pk-pk, Output Power Limit 100 dBm, Harmonics -60 dBc. Tags: Benchtop / Rackmount, Power Amplifier. More details for S4UI can be seen below.