The DBTC-13-4+ from Mini Circuits is a Directional Coupler with Frequency 5 MHz to 1 GHz, Coupling 12.95 to 13.08 dB, Directivity 13.82 to 22.34 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Surface Mount. More details for DBTC-13-4+ can be seen below.