The AM2437B537 from Anatech Electronics is a Band Pass Filter with Frequency 2.412 to 2.462 GHz, Bandwidth 50 MHz, Center Frequency 2437 MHz, Insertion Loss 3.2 dB, Rejection 20 to 30 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2437B537 can be seen below.