The F2128 from WENTEQ Microwave Corp is a RF & Microwave Isolator with Frequency 3.4 to 4.8 GHz, Bandwidth 400MHz, Average Power Forward 10 W, Average Power Reverse 2 W, Insertion Loss 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for F2128 can be seen below.