The SC-20N from Microlab is a Directional Coupler with Frequency 130 to 174 MHz, 380 to 512 MHz, 728 to 960 MHz, Coupling 20 dB, Directivity 18 dB, Average Power 50 W, Insertion Loss 0.25 dB(Dissipative). Tags: Module with Connectors. More details for SC-20N can be seen below.