The AM1227B1024 from Anatech Electronics is a Band Pass Filter with Frequency 1.22 to 1.23 GHz, Bandwidth 10 MHz, Center Frequency 1227 MHz, Insertion Loss 4 dB, Lower Rejection 30 dB @ +/- 35 MHz from Center Frequency. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1227B1024 can be seen below.