The CRG-10B-255 from Crane Aerospace & Electronics is a Bi-Directional Coupler with Frequency 5 to 500 MHz, Frequency Sensitivity ±0.5 dB, Coupling 10 dB, Coupling Variation ±1 dB, Power 1 W. Tags: Surface Mount, Multi-Octave. More details for CRG-10B-255 can be seen below.