The K4X from Communications & Power Industries is a RF Amplifier with Frequency 7.9 to 8.4 GHz, Gain 77 dB, Small Signal Gain 0.4 dB pk-pk, Output Power Limit 64 to 65.1 dBm, Harmonics -80 to -35 dBc. Tags: Benchtop / Rackmount, Power Amplifier. More details for K4X can be seen below.