The D404 from Clear Microwave, Inc is a Power Divider with Frequency DC to 4 GHz, Insertion Loss 0.5 to 0.7 dB, Input Power 2 W, Amplitude Balance 0.06 to 0.12 dB, Phase Balance 0.6 to 1.2 Degree. Tags: Module with Connectors, Through Hole, Resistive Power Divider. More details for D404 can be seen below.