The 251-017-006 from Broadwave Technologies is a Directional Coupler with Frequency 2000 to 4000 MHz, Coupling 6 dB, Coupling Variation ± 1.0 dB, Frequency Sensitivity ± 0.6 dB, Directivity 20 dB. Tags: Module with Connectors. More details for 251-017-006 can be seen below.