The HEM387C from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 100 to 700 MHz, Gain 20 to 21 dB, Gain Flatness ±0.5 dB, Noise Figure 2.5 dB, Output Power 15 to 16 dBm. Tags: Power Amplifier. More details for HEM387C can be seen below.