The CH-90-2000-4000-400-NF from DETI Microwave is a 90 Degree Hybrid Coupler with Frequency 2 to 4 GHz, Average Power 400 W (CW), Peak Power 1.6 kW, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Module with Connectors. More details for CH-90-2000-4000-400-NF can be seen below.