The 151-039-004 from Broadwave Technologies is a Power Divider with Frequency 2 to 4 GHz, Insertion Loss 0.75 dB, Isolation 20 to 25 dB, Input Power 5 W, Amplitude Balance ±0.3 dB. Tags: Module with Connectors, Reactive Power Divider. More details for 151-039-004 can be seen below.