The X4C60K1-20S from TTM Technologies is a Directional Coupler with Frequency 4.4 to 6.5 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.15 to ±0.30 dB, Directivity 20 dB. Tags: Surface Mount. More details for X4C60K1-20S can be seen below.