The C1XR1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.215 to 1.4 GHz, Average Power 2.5 kW, Average Power Forward 2.5 kW, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for C1XR1 can be seen below.