The CWK-10R-21G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 2000 to 40000 MHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.65 dB, Directivity 11 dB. Tags: Module with Connectors. More details for CWK-10R-21G can be seen below.