The KNP9000S53A from KeyLink Microwave is a RF Amplifier with Frequency 8.5 to 9.5 GHz, Input Power -1 to 1 dBm, Input Return Loss -10 dB, Harmonics -40 dBc, Spurious -55 dBc. Tags: Benchtop / Rackmount, Power Amplifier. More details for KNP9000S53A can be seen below.