The AM1747B1677 from Anatech Electronics is a Band Pass Filter with Frequency 1.7095 to 1.7845 GHz, Bandwidth 75 MHz, Center Frequency 1747 MHz, Insertion Loss 2.1 dB, Rejection 20 to 24 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1747B1677 can be seen below.