The AM1227B79 from Anatech Electronics is a Band Pass Filter with Frequency 1.21 to 1.24 GHz, Bandwidth 30 MHz, Center Frequency 1227 MHz, Insertion Loss 0.95 dB, Upper Rejection 22 dB center frequency +140 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1227B79 can be seen below.