The U-403-1/-2 from Stellant Systems is a Directional Coupler with Frequency 360 to 380 MHz, Coupling 3 dB, Average Power 340 W, Peak Power 1090 W, Insertion Loss 0.2 dB. Tags: Module with Connectors, Branch Line Couplers. More details for U-403-1/-2 can be seen below.