The AM452-467D1251 from Anatech Electronics is a RF Duplexer with Frequency 450 to 455 MHz / 465 to 470 MHz, Band 1 450 to 455 MHz, Band 2 465 to 470 MHz, Power 5 W, Insertion Loss 2.8 dB. Tags: Surface Mount, Ceramic. More details for AM452-467D1251 can be seen below.