The BWAES-8/12-4 from Sainty-Tech Communications Limited is a Gain Equalizer with Frequency 8 to 12 GHz, Insertion Loss 0.8 to 1.1 dB, Power 30 dBm, Impedance 50 Ohms, Operating Temperature -55 to 125 Degree C. Tags: Die, Negative Gain Slope. More details for BWAES-8/12-4 can be seen below.