The D4-40006_7_8 from Crane Aerospace & Electronics is a Bi-Directional Coupler with Frequency 10 to 500 MHz, Coupling 10 dB, Coupling Variation ±0.3 dB, Power 3 W, Insertion Loss 0.5 dB. Tags: Flatpack. More details for D4-40006_7_8 can be seen below.