The CPL10F2P-4321-B5B5 from ETL Systems is a Proximity Coupler with Frequency 50 to 200 MHz, Coupling 10 dB, Insertion Loss 1.8 to 2 dB, Average Power 0.04 W, Operating Temperature 0 to 45 Degree C. Tags: Module with Connectors, Proximity Coupler. More details for CPL10F2P-4321-B5B5 can be seen below.