The BVA304B from BeRex, Inc. is a RF Amplifier with Frequency 50 MHz to 4 GHz, Gain 14.4 dB, Noise Figure 3.3 dB, Output Power 19.1 dBm, Output Power 0.09 W. Tags: Surface Mount, Digital Variable Gain Amplifier, Gain Block. More details for BVA304B can be seen below.