The DBTC-12-4-75+ from Mini Circuits is a Directional Coupler with Frequency 5 MHz to 1.2 GHz, Coupling 11.92 to 12.41 dB, Directivity 11.54 to 19.5 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Surface Mount. More details for DBTC-12-4-75+ can be seen below.