The AM701-731D1015 from Anatech Electronics is a RF Duplexer with Frequency 698 to 704 MHz / 728 to 734 MHz, Band 1 698 to 704 MHz, Band 2 728 to 734 MHz, Power 5 W, Insertion Loss 2.8 dB. Tags: Surface Mount, Ceramic. More details for AM701-731D1015 can be seen below.