The HE397B from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 10 to 3000 MHz, Gain 13 to 14.5 dB, Gain Flatness ±0.5 dB, Noise Figure 2 dB, Output Power 15 to 16 dBm. Tags: Power Amplifier. More details for HE397B can be seen below.