The WMC-2-8-20dB-S from Werbel Microwave is a Directional Coupler with Frequency 2 to 8 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.50 to ±1.25 dB, Directivity 18 to 22 dB. Tags: Module with Connectors. More details for WMC-2-8-20dB-S can be seen below.