The BVA303B from BeRex, Inc. is a RF Amplifier with Frequency 30 MHz to 4 GHz, Gain 20 to 22 dB, Noise Figure 2.7 dB, Output Power 16 dBm, Output Power 0.04 W. Tags: Surface Mount, Digital Variable Gain Amplifier, Gain Block. More details for BVA303B can be seen below.