The HEM872 from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 20 to 1000 MHz, Gain 35 to 37 dB, Gain Flatness ±0.5 dB, Noise Figure 1.2 dB, Output Power 17 to 18 dBm. Tags: Power Amplifier. More details for HEM872 can be seen below.