The LLC18-N-MM from Maury Microwave is a Bi-Directional Coupler with Frequency 600 MHz to 18 GHz, Coupling 30 dB, Power 500 W, Peak Power 2 kW, Insertion Loss 0.25 to 0.35 dB. Tags: Module with Connectors. More details for LLC18-N-MM can be seen below.