The PCD-2000-4000-R3N30 from Preferred Power Products (P3) is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 2 to 4 GHz, Average Power 300 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for PCD-2000-4000-R3N30 can be seen below.