The HE389B from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 250 MHz, Gain 29 to 30 dB, Gain Flatness ±0.5 dB, Noise Figure 3 dB, Output Power 22 to 23.5 dBm. Tags: Drop-In, Power Amplifier. More details for HE389B can be seen below.