The AM2498B1248 from Anatech Electronics is a Band Pass Filter with Frequency 2.44 to 2.55 GHz, Bandwidth 110 MHz, Center Frequency 2498.5 MHz, Insertion Loss 2.5 dB, Upper Rejection 15dB @ 2598 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM2498B1248 can be seen below.