The AM2104B1382 from Anatech Electronics is a Band Pass Filter with Frequency 2.099 to 2.109 GHz, Bandwidth 10 MHz, Center Frequency 2104 MHz, Insertion Loss 2.2 dB, Rejection 30 to 40 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2104B1382 can be seen below.