The T27A2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 27.5 to 30.5 GHz, Average Power 1 W, Average Power Forward 1 W, Isolation 20 dB, Operating Temperature -20 to 70 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for T27A2 can be seen below.