The AM836-881D1109 from Anatech Electronics is a RF Duplexer with Frequency 824 to 849 MHz / 869 to 894 MHz, Band 1 824 to 849 MHz, Band 2 869 to 894 MHz, Power 3 W, Insertion Loss 3 dB. Tags: Surface Mount, Ceramic. More details for AM836-881D1109 can be seen below.