The AM2437B990 from Anatech Electronics is a Band Pass Filter with Frequency 2.4 to 2.47 GHz, Bandwidth 66 MHz, Center Frequency 2437 MHz, Insertion Loss 3.0 dB, Upper Rejection 15dB @ 2483.5 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM2437B990 can be seen below.
