The dBDC1000400300A from Qotana is a Dual Directional Coupler with Coupling 10 dB, Frequency 400 MHz to 4 GHz, Average Power 50 W, Insertion Loss 0.5 dB, Directivity 20 dB. Tags: Module with Connectors. More details for dBDC1000400300A can be seen below.