The D0321581 from Microwave Circuits is a Diplexer with Frequency f1 1723 to 2125 MHz, Frequency f2 2190 to 2320 MHz, Attenuation 30 to 80 dBc, Attenuation f1 30 to 80 dBc, Attenuation f2 30 to 60 dBc. Tags: Module with Connectors. More details for D0321581 can be seen below.