The AM1278B1705 from Anatech Electronics is a Band Pass Filter with Frequency 1266.25 to 1291.25 MHz, Bandwidth 25 MHz, Center Frequency 1278.75 MHz, Insertion Loss 4.5 dB, Rejection 10 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1278B1705 can be seen below.