The AFS4-00100400-25-20P-4 from Narda-MITEQ is a RF Amplifier with Frequency 100 MHz to 4 GHz, Gain 38 dB, Gain Flatness ± 1.5 dB, Noise Figure 2.5 dB, Output Power 20 dBm. Tags: Power Amplifier, Low Noise Amplifier. More details for AFS4-00100400-25-20P-4 can be seen below.