The D3-40007 / 40008 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 10 to 500 MHz, Coupling 15 dB, Coupling Variation ±0.2 dB, Directivity 25 dB, Average Power 3 W. Tags: Module with Connectors. More details for D3-40007 / 40008 can be seen below.