The HEM554E from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 2700 to 3000 MHz, Gain 12 to 13 dB, Gain Flatness ±0.4 dB, Noise Figure 0.7 dB, Output Power 8 to 9 dBm. Tags: Low Noise Amplifier. More details for HEM554E can be seen below.