The K4D from Communications & Power Industries is a RF Amplifier with Frequency 16.7 to 18.4 GHz, Gain 75 dB, Small Signal Gain 0.4 to 0.65 dB pk-pk, Output Power Limit 61.46 to 63.8 dBm, Harmonics -70 to -35 dBc. Tags: Benchtop / Rackmount, Power Amplifier. More details for K4D can be seen below.