The AM3525B1249 from Anatech Electronics is a Band Pass Filter with Frequency 3.35 to 3.7 GHz, Bandwidth 350 MHz, Center Frequency 3525 MHz, Insertion Loss 3 dB, Upper Rejection 40 dB 5225 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM3525B1249 can be seen below.