The XC0900B-30S from Anaren Inc is a Directional Coupler with Frequency 800 MHz to 1 GHz, Coupling 28.8 to 29.5 Db, Coupling Variation +/-0.9 to 1.00 dB, Directivity 23 to 25 dB, Power 355 to 385 W. Tags: Surface Mount. More details for XC0900B-30S can be seen below.