The AD1719-1841D436 from Anatech Electronics is a RF Duplexer with Frequency 1699 to 1739 MHz / 1821 to 1861 MHz, Band 1 1699 to 1739 MHz, Band 2 1821 to 1861 MHz, Power 5 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD1719-1841D436 can be seen below.