The AIC-21B-8689 from Stellant Systems is a RF & Microwave Isolator with Frequency 0.869 to 0.894 GHz, Average Power Forward 100 W, Average Power Reverse 1 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Module with Connector, Coaxial Isolator. More details for AIC-21B-8689 can be seen below.