The AM1880B1423 from Anatech Electronics is a Band Pass Filter with Frequency 1.85 to 1.91 GHz, Bandwidth 60 MHz, Center Frequency 1880 MHz, Insertion Loss 3 dB, Rejection 5 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1880B1423 can be seen below.