The EQN0104-03 from Eclipse MDI is a Gain Equalizer with Frequency 1 to 4 GHz, Gain Equalization 3 dB, Insertion Loss 0.8 dB, Power 21.76 dBm, Impedance 50 Ohms. Tags: Module with Connectors, Positive Gain Slope. More details for EQN0104-03 can be seen below.