The CRP-20N-250 from Crane Aerospace & Electronics is a Bi-Directional Coupler with Frequency 5 to 500 MHz, Frequency Sensitivity ±0.75 to 0.5 dB, Coupling 20 dB, Coupling Variation ±1 dB, Power 1 W. Tags: Drop-In, Low Profile. More details for CRP-20N-250 can be seen below.