The T1CF2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.1 to 1.2 GHz, Average Power 1 W, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 19 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1CF2 can be seen below.