The ZUDC20-183+ from Mini Circuits is a Bi-Directional Coupler with Frequency 500 MHz to 18 GHz, Coupling 20 dB, Average Power 150 W, Power 10 to 50 W, Insertion Loss 0.4 to 1.8 dB. Tags: Module with Connectors. More details for ZUDC20-183+ can be seen below.