The IS-111 from MCLI is a RF & Microwave Isolator with Frequency 700 MHz to 1.4 GHz, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature 0 to 50 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-111 can be seen below.