The ERA-51SM-DG+ from Mini Circuits is a RF Amplifier with Frequency DC to 4 GHz, Gain 12.5 to 18 dB, Noise Figure 3.6 to 4 dB, Output Power 23 to 18.3 dBm, Output Power 0.2 to 0.07 W. Tags: Surface Mount, Gain Block. More details for ERA-51SM-DG+ can be seen below.