The 4057 from Ophir RF is a RF Amplifier with Frequency 2.4 to 2.5 GHz, Gain 41 dB, Gain Flatness ± 0.75 dB max, Output Power 39.03 to 40 dBm, Output Power 8 to 10 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 4057 can be seen below.