The AMFW-5S-03700420-35 from Narda-MITEQ is a Waveguide Amplifier with Frequency 3.7 to 4.2 GHz, Gain 40 dB, Gain Flatness +/- 0.5 dB, P1dB (dBm) 10 dBm, P1dB (W) 0.01 W. Tags: Low Noise Amplifier. More details for AMFW-5S-03700420-35 can be seen below.