The FMCP1057 from Fairview Microwave is a Directional Coupler with Frequency 698 MHz to 2.7 GHz, Coupling 6 dB, Coupling Variation ±1 dB, Frequency Sensitivity 0.4 dB, Directivity 20 dB. Tags: Module with Connectors. More details for FMCP1057 can be seen below.