The X3C09P1-04S from TTM Technologies is a Directional Coupler with Frequency 800 MHz to 1 GHz, Coupling 4 dB, Coupling Variation ±0.2 to ±0.3 dB, Frequency Sensitivity ±0.05 to ±0.25 dB, Directivity 23 to 25 dB. Tags: Surface Mount. More details for X3C09P1-04S can be seen below.