The D3-20005_6 from Crane Aerospace & Electronics is a Bi-Directional Coupler with Frequency 0.75 to 75 MHz, Coupling 10 dB, Coupling Variation ±0.1 dB, Power 3 W, Insertion Loss 0.35 dB. Tags: Module with Connectors. More details for D3-20005_6 can be seen below.