The TFS1227B from Vectron International is a Band Pass Filter with Frequency 1215 to 1237 MHz, Insertion Loss 2.4 to 4 dB, Rejection 6 to 54 dB, Upper Rejection 11 to 54 dB, Lower Rejection 6 to 49 dB. Tags: Surface Mount, RF SAW Filter. More details for TFS1227B can be seen below.