The BC-050S-11S from UMCC is a Bi-Directional Coupler with Frequency 1 to 500 MHz, Coupling 11 dB, Coupling Variation ± 1 dB, Average Power 1 W, Insertion Loss 2.5 to 3.2 dB. Tags: Module with Connectors. More details for BC-050S-11S can be seen below.