The CHP274-40F-40R from Narda-ATM is a Dual Directional Coupler with Coupling 40 dB, Frequency 2 to 4 GHz, Peak Power 10 kW, Average Power 600 W, Insertion Loss 0.15 to 0.2 dB. Tags: Module with Connectors. More details for CHP274-40F-40R can be seen below.