The TFSC06054125-2120A1X from TDK is a Directional Coupler with Frequency 2.4 to 2.5 GHz / 4.9 to 5.85 GHz, Coupling 12 to 20 dB, Directivity 16 to 23.8 dB, Average Power 3 W, Insertion Loss 0.07 to 0.5 dB. Tags: Surface Mount. More details for TFSC06054125-2120A1X can be seen below.