The TCD-13-4X+ from Mini Circuits is a Directional Coupler with Frequency 3 MHz to 1 GHz, Coupling 12.71 to 13.03 dB, Directivity 13.56 to 22.2 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Surface Mount. More details for TCD-13-4X+ can be seen below.