The APT4-04400500-1315-D6-PLH from AmpliTech, Inc. is a RF Amplifier with Frequency 4.4 to 5 GHz, Gain 40 dB, Gain Flatness ±1 dB, Noise Figure 1.30 dB. Tags: Drop-In, Low Noise Amplifier. More details for APT4-04400500-1315-D6-PLH can be seen below.