The KB0520S57A from KeyLink Microwave is a RF Amplifier with Frequency 500 MHz to 2 GHz, Power Gain 57 dB, Gain Flatness 2.5 dB (Power Gain Flatness), Output Power 56.99 dBm, Output Power 500.03 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for KB0520S57A can be seen below.