The HE550 from BOWEI Integrated Circuits is a RF Amplifier with Frequency 320 to 380 MHz, Gain 25 to 28 dB, Gain Flatness ±1.25 dB, Noise Figure 0.7 to 1.2 dB, Supply Voltage 5 V. Tags: Drop-In, Low Noise Amplifier. More details for HE550 can be seen below.