The CX4X1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 400 to 500 MHz, Average Power 1.4 kW, Average Power Forward 1.4 kW, Peak Power 10000 W, Insertion Loss 0.4 dB. Tags: Module with Connectors, Coaxial Isolator. More details for CX4X1 can be seen below.