The BC-100S-30S from UMCC is a Bi-Directional Coupler with Frequency 20 MHz to 1 GHz, Coupling 30 dB, Coupling Variation ± 1.5 dB, Average Power 2 W, Insertion Loss 1 to 1.6 dB. Tags: Module with Connectors. More details for BC-100S-30S can be seen below.