The CHP275-30F-30R from Narda-ATM is a Dual Directional Coupler with Coupling 30 dB, Frequency 4 to 8 GHz, Peak Power 10 kW, Average Power 600 W, Insertion Loss 0.15 to 0.2 dB. Tags: Module with Connectors. More details for CHP275-30F-30R can be seen below.