The BG20B from BeRex, Inc. is a RF Amplifier with Frequency 5 to 800 MHz, Gain 20.5 to 22 dB, Noise Figure 4.6 to 4.8 dB, Output Power 19 to 21 dBm, Output Power 0.08 to 0.13 W. Tags: Surface Mount, Power Amplifier. More details for BG20B can be seen below.