The HEM1054B-3 from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 10 to 500 MHz, Gain 14 to 15 dB, Gain Flatness ±1.0 dB, Noise Figure 5 dB, Output Power 22 to 23 dBm. Tags: Power Amplifier. More details for HEM1054B-3 can be seen below.