The ZHL-10M4G21W2+ from Mini Circuits is a RF Amplifier with Frequency 10 to 4200 MHz, Small Signal Gain 38 to 44 dB, Gain Flatness ± 1.3 to ± 2.1 dB, Noise Figure 5.6 dB, P1dB 27 to 33 dBm. Tags: Benchtop / Rackmount, Gain Block. More details for ZHL-10M4G21W2+ can be seen below.