The DC1600M1800B20C20PS-01 from Dyne Tech is a Directional Coupler with Frequency 700 MHz to 2.5 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 18 dB, Average Power 20 W. Tags: Module with Connectors. More details for DC1600M1800B20C20PS-01 can be seen below.