The 721-20-0.900 from MECA is a Directional Coupler with Frequency 600 MHz to 1.2 GHz, Coupling 20 dB, Coupling Variation -0.6 to 6 dB, Directivity 27 to 30 dB, Power 500 W. Tags: Module with Connectors. More details for 721-20-0.900 can be seen below.