The 4055 from Ophir RF is a RF Amplifier with Frequency 1.805 to 1.88 GHz, Gain 50 dB Typical, Gain Flatness ± 0.75 dB max, Output Power 50 dBm, Output Power 100 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 4055 can be seen below.