The T1DF1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.805 to 1.99 GHz, Average Power 5 W, Average Power Forward 5 W, Insertion Loss 0.2 dB, Isolation 23 dB. Tags: Drop-In, Drop-In Isolator. More details for T1DF1 can be seen below.