The KNP1400S57A from KeyLink Microwave is a RF Amplifier with Frequency 1.2 to 1.6 GHz, Gain 57 dB, Output Power Limit 56.99 dBm, Output Power Limit 500.03 W, AC Voltage 100 to 260 VAC, 50/60Hz V. Tags: Power Amplifier. More details for KNP1400S57A can be seen below.