The HE388D-2B from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 600 MHz, Gain 21 to 22 dB, Gain Flatness ±0.5 to 1 dB, Noise Figure 1 to 1.5 dB, Output Power 21 to 22 dBm. Tags: Drop-In, Power Amplifier. More details for HE388D-2B can be seen below.