The HE391A from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 700 MHz, Gain 15 to 16 dB, Gain Flatness ±0.5 to 1 dB, Noise Figure 3 to 4 dB, Output Power 17 to 17.5 dBm. Tags: Drop-In, Power Amplifier. More details for HE391A can be seen below.