The DBTC-12-4X+ from Mini Circuits is a Directional Coupler with Frequency 10 MHz to 1 GHz, Coupling 11.9 to 12.13 dB, Directivity 14.74 to 37.41 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Surface Mount. More details for DBTC-12-4X+ can be seen below.