The AM1200B1356 from Anatech Electronics is a Band Pass Filter with Frequency 1.19 to 1.21 GHz, Bandwidth 20 MHz, Center Frequency 1200 MHz, Insertion Loss 3.2 dB, Upper Rejection 65 dBc @ 1400 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1200B1356 can be seen below.