The 106-990-0397 from Millennium Microwave Corporation is a Multiplexer with Attenuation 10 to 60 dB, Frequency 730 to 8000 MHz, Insertion Loss 1.75 to 5.5 dB, Power handling 2 W, Return Loss -12.7 to -10.1 dB. Tags: Module with Connectors. More details for 106-990-0397 can be seen below.