The KB2040S53A from KeyLink Microwave is a RF Amplifier with Frequency 2 to 4 GHz, Gain 53 dB, Output Power Limit 53.01 dBm, Output Power Limit 199.99 W, AC Voltage 100 to 260 VAC, 50/60Hz V. Tags: Power Amplifier. More details for KB2040S53A can be seen below.