The HLS28M4Q from MILLIBEAM is a RF Amplifier with Frequency (3.1 - 4.2 GHz) + (26.5 - 29.5 GHz), Gain 30 dB, Gain Flatness ±0.5 dB, Noise Figure 4.5 dB, Supply Voltage 20 V. Tags: Surface Mount, Low Noise Amplifier. More details for HLS28M4Q can be seen below.