The CH_CHS-137 from MACOM is a Bi-Directional Coupler with Frequency 0.5 to 400 MHz, Coupling 19 to 21 dB, Average Power 3 W, Insertion Loss 0.4 to 0.6 dB, Directivity 15 to 30 dB. Tags: Module with Connectors. More details for CH_CHS-137 can be seen below.