The CRM-15-500 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 5 to 1000 MHz, Coupling 15 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.5 to ±0.75 dB, Directivity 20 to 25 dB. Tags: Module with Connectors. More details for CRM-15-500 can be seen below.