The D1776M04 from Microwave Circuits is a Diplexer with Frequency f1 1710 to 1751 MHz, Frequency f2 1800 to 1841 MHz, Insertion loss 2.5 dB, Frequency 1710 to 1751 MHz / 1800 to 1841 MHz, Operating Temperature -35 to 50 Degree C. Tags: Module with Connectors. More details for D1776M04 can be seen below.