The CP20018A-20 from Amtery is a Bi-Directional Coupler with Frequency 500 MHz to 18 GHz, Coupling 18.5 to 21.5 dB, Average Power 20 W, Insertion Loss 1.3 to 1.6 dB, Directivity 18 to 23 dB. Tags: Module with Connectors. More details for CP20018A-20 can be seen below.