The D403 from Clear Microwave, Inc is a Power Divider with Frequency DC to 3 GHz, Insertion Loss 0.4 to 0.6 dB, Input Power 2 W, Amplitude Balance 0.05 to 0.1 dB, Phase Balance 0.5 to 1 Degree. Tags: Module with Connectors, Through Hole, Resistive Power Divider. More details for D403 can be seen below.