The AM2400B1589 from Anatech Electronics is a Band Pass Filter with Frequency 2.37 to 2.43 GHz, Bandwidth 60 MHz, Center Frequency 2400 MHz, Insertion Loss 2 dB, Rejection 30 to 60 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2400B1589 can be seen below.