The QBS-204 from Spectrum Control is a RF Amplifier with Frequency 3.7 to 4.2 GHz, Gain 26.5 to 27 dB, Noise Figure 8 to 9 dB, Output Power 37.5 to 39 dBm, Output Power 5.62 to 7.94 W. Tags: Power Amplifier, Driver Amplifier. More details for QBS-204 can be seen below.