The HE387B from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 400 MHz, Gain 25 to 26 dB, Gain Flatness ±0.5 dB, Noise Figure 3.2 dB, Output Power 20 to 21 dBm. Tags: Drop-In, Power Amplifier. More details for HE387B can be seen below.