The SYDC-30-12HP+ from Mini Circuits is a Bi-Directional Coupler with Frequency 20 to 100 MHz, Coupling 28.11 to 28.78 dB, Average Power 55 W, Power 0 to 55 W, Insertion Loss 0.03 to 0.07 dB. Tags: Surface Mount. More details for SYDC-30-12HP+ can be seen below.