The HE383B-4 from BOWEI Integrated Circuits is a RF Amplifier with Frequency 100 to 600 MHz, Gain 11 to 12 dB, Gain Flatness ±0.5 to 1 dB, Noise Figure 1.7 to 2.5 dB, Output Power 27 dBm. Tags: Drop-In, Power Amplifier. More details for HE383B-4 can be seen below.