The T4XR2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4 to 5.5 GHz, Average Power 0.1 W, Average Power Forward 0.1 W, Insertion Loss 0.7 dB, Isolation 15 dB. Tags: Microstrip, Microstrip Isolator. More details for T4XR2 can be seen below.