The IS-34-1 from MCLI is a RF & Microwave Isolator with Frequency 980 MHz to 2.05 GHz, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -20 to 80 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-34-1 can be seen below.