The HES554L from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 2000 to 2500 MHz, Gain 22 to 24 dB, Gain Flatness ±1.0 dB, Noise Figure 1.1 dB, Output Power 10 to 10.5 dBm. Tags: Low Noise Amplifier. More details for HES554L can be seen below.