The HEM571L from Sainty-Tech Communications Limited is a RF Amplifier with Frequency 1000 to 3500 MHz, Gain 12 to 14 dB, Gain Flatness ±0.75 dB, Noise Figure 3.2 dB, Output Power 18 to 19 dBm. Tags: Power Amplifier. More details for HEM571L can be seen below.