The ADC-20-12+ from Mini Circuits is a Directional Coupler with Frequency 100 MHz to 1.2 GHz, Coupling 19.94 to 20.63 dB, Directivity 20.72 to 27.78 dB, Power 1 W, Average Power 1 W. Tags: Surface Mount. More details for ADC-20-12+ can be seen below.