The MXC859M20B4W10PS-01 from Dyne Tech is a Quadplexer with Attenuation 70 dB, Frequency 824 to 1990 MHz, Frequency1 824 to 849 MHz, Frequency2 869 to 894 MHz, Frequency3 1850 to 1910 MHz. Tags: Module With Connectors. More details for MXC859M20B4W10PS-01 can be seen below.