The AMFW-5S-03700420-28 from Narda-MITEQ is a RF Amplifier with Frequency 3.7 to 4.2 GHz, Gain 40 dB, Gain Flatness ± 0.5 dB, Noise Figure 0.4 dB, P1dB 10 dBm. Tags: Power Amplifier, Low Noise Amplifier. More details for AMFW-5S-03700420-28 can be seen below.