The HES374B from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 20 to 1500 MHz, Gain 9.5 to 11 dB, Gain Flatness ±0.75 dB, Noise Figure 4.5 dB, Output Power 8.5 to 9 dBm. Tags: Power Amplifier. More details for HES374B can be seen below.