The HE391C from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 400 MHz, Gain 14 to 16 dB, Gain Flatness ±0.6 to 1 dB, Noise Figure 4 dB, Output Power 23 to 24 dBm. Tags: Drop-In, Power Amplifier. More details for HE391C can be seen below.