The RMHY3.400Sf from Response Microwave Inc is a 90 Degree Hybrid Coupler with Frequency 225 to 400 MHz, Insertion Loss 0.3 dB, Isolation 15 dB, Coupling 3 dB, VSWR 1.20:1. Tags: Module with Connectors. More details for RMHY3.400Sf can be seen below.