The HES383B from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 20 to 500 MHz, Gain 10 to 11 dB, Gain Flatness ±0.5 dB, Noise Figure 4 dB, Output Power 16 to 16.5 dBm. Tags: Power Amplifier. More details for HES383B can be seen below.