The TG501B / 2-8GHz from Sainty-Tech Communications Limited is a RF & Microwave Isolator with Frequency 2 to 8 GHz, Average Power Reverse 10 W (Load), Insertion Loss 1.5 dB, Isolation 12 dB, Operating Temperature 0 to 60 Degree C. Tags: Coaxial Isolator. More details for TG501B / 2-8GHz can be seen below.