The ERA-21SM+ from Mini Circuits is a RF Amplifier with Frequency DC to 8 GHz, Gain 12.2 dB, Noise Figure 4.7 dB, Output Power 50.79 to 12.6 dBm, Output Power 119.95 to 0.02 W. Tags: Surface Mount, Power Amplifier, CATV Amplifier. More details for ERA-21SM+ can be seen below.