The CHP272L-50F-50R from Narda-ATM is a Dual Directional Coupler with Coupling 50 dB, Frequency 800 MHz to 4.2 GHz, Peak Power 10 kW, Average Power 600 W, Insertion Loss 0.15 to 0.2 dB. Tags: Module with Connectors. More details for CHP272L-50F-50R can be seen below.