The AM2100B1588 from Anatech Electronics is a Band Pass Filter with Frequency 2.07 to 2.13 GHz, Bandwidth 60 MHz, Center Frequency 2100 MHz, Insertion Loss 2 dB, Rejection 30 to 60 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2100B1588 can be seen below.