The D-0540-4 from RLC Electronics is a Power Divider with Frequency 500 to 4000 MHz, Insertion Loss 1.1 dB, Isolation 20 dB, Input Power 10 W, Amplitude Balance 0.2 dB. Tags: Module with Connectors, Wilkinson Power Divider. More details for D-0540-4 can be seen below.