The HE551 from BOWEI Integrated Circuits is a RF Amplifier with Frequency 900 MHz to 1.3 GHz, Gain 28 to 30 dB, Gain Flatness ±1 dB, Noise Figure 1 to 1.3 dB, Output Power 11 to 11.5 dBm. Tags: Drop-In, Low Noise Amplifier. More details for HE551 can be seen below.