The IS-40 from MCLI is a RF & Microwave Isolator with Frequency 800 MHz to 1 GHz, Average Power Forward 1 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature 0 to 50 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-40 can be seen below.