The HEM397C from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 100 to 4000 MHz, Gain 14 to 16 dB, Gain Flatness ±1.0 dB, Noise Figure 1.4 dB, Output Power 9 to 11 dBm. Tags: Power Amplifier. More details for HEM397C can be seen below.