The BG13B from BeRex, Inc. is a RF Amplifier with Frequency 5 MHz to 6 GHz, Gain 10.8 to 13.8 dB, Noise Figure 8.1 to 9.4 dB, Output Power 15.2 to 18.5 dBm, Output Power 0.03 to 0.07 W. Tags: Surface Mount, Gain Block, Power Amplifier. More details for BG13B can be seen below.