The AM1842B1680 from Anatech Electronics is a Band Pass Filter with Frequency 1.8045 to 1.8795 GHz, Bandwidth 75 MHz, Center Frequency 1842 MHz, Insertion Loss 3.6 dB, Rejection 10 to 30 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1842B1680 can be seen below.