The AD1967-2157D441 from Anatech Electronics is a RF Duplexer with Frequency 1965 to 1970 MHz / 2155 to 2160 MHz, Band 1 1965 to 1970 MHz, Band 2 2155 to 2160 MHz, Power 250 W, Insertion Loss 0.7 to 1.8 dB. Tags: Module with Connectors. More details for AD1967-2157D441 can be seen below.