The AM849B1030 from Anatech Electronics is a Band Pass Filter with Frequency 849 to 850.5 MHz, Bandwidth 1.5 MHz, Center Frequency 849.75 MHz, Insertion Loss 2.5 dB, Rejection 25 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM849B1030 can be seen below.