The BWAES-2/4-3 from Sainty-Tech Communications Limited is a Gain Equalizer with Frequency 2 to 4 GHz, Insertion Loss 1 to 1.2 dB, Power 30 dBm, Impedance 50 Ohms, Operating Temperature -55 to 125 Degree C. Tags: Die, Negative Gain Slope. More details for BWAES-2/4-3 can be seen below.