The KB0842S47A from KeyLink Microwave is a RF Amplifier with Frequency 800 MHz to 4.2 GHz, Gain 47 dB, Output Power Limit 46.99 dBm, Output Power Limit 50 W, AC Voltage 100 to 260 VAC, 50/60Hz V. Tags: Power Amplifier. More details for KB0842S47A can be seen below.