The HEM553L from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 1400 to 1700 MHz, Gain 23 to 28 dB, Gain Flatness ±1.0 dB, Noise Figure 1.1 dB, Output Power 10 to 12 dBm. Tags: Low Noise Amplifier. More details for HEM553L can be seen below.