The MPAR-004020S50 from Fujian MIcable is a RF Amplifier with Frequency 0.45 to 2 GHz, Gain 49 to 51 dB, Small Signal Gain 53 to 55 dB, Gain Flatness ±1.5 to 2 dB, Noise Figure 8 to 10 dB. Tags: Benchtop / Rackmount, Power Amplifier. More details for MPAR-004020S50 can be seen below.