The AM424-435D1113 from Anatech Electronics is a RF Duplexer with Frequency 423 to 425 MHz / 434 to 436 MHz, Band 1 423 to 425 MHz, Band 2 434 to 436 MHz, Power 3 W, Insertion Loss 3.8 dB. Tags: Surface Mount, Ceramic. More details for AM424-435D1113 can be seen below.