The PCM4S5AIO from Empower RF is a RF Amplifier with Frequency 1.93 to 1.995 GHz, Small Signal Gain 49 to 51 dB pk-pk, Gain Flatness ±0.75 dB, Input Return Loss -18 dB, Harmonics -45 dBc. Tags: Power Amplifier. More details for PCM4S5AIO can be seen below.