The ATi2-4 from Narda-ATM is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power 2 W, Average Power Forward 2 W, Peak Power Forward 0.02 kW, Insertion Loss 0.4 to 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for ATi2-4 can be seen below.