The HC-W20S-MS from UMCC is a 180 Degree Hybrid Coupler with Frequency 1 to 200 MHz, Average Power 4 W, Peak Power 4 W, Coupling 3 dB, Amplitude Balance ± 0.3 dB. Tags: Module with Connector, 180 Degree Hybrid Couplers. More details for HC-W20S-MS can be seen below.