The MM-BHC-010040-90 from Mountain Microwave Technology is a 90 Degree Hybrid Coupler with Frequency 1 to 4 GHz, Average Power 50 W, Insertion Loss 0.3 dB, Isolation 25 dB, Coupling 3 dB. Tags: Module with Connectors. More details for MM-BHC-010040-90 can be seen below.