The T1AN4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.805 to 1.88 GHz, Average Power 120 W, Average Power Forward 120 W, Peak Power 50 W, Insertion Loss 0.2 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1AN4 can be seen below.