The AD453-473D387 from Anatech Electronics is a RF Duplexer with Frequency 448.25 to 458.25 MHz / 468.475 to 478.475 MHz, Band 1 448.25 to 458.25 MHz, Band 2 468.475 to 478.475 MHz, Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD453-473D387 can be seen below.