The AM1747S163 from Anatech Electronics is a Band Pass Filter with Frequency 1.71 to 1.78 GHz, Bandwidth 75 MHz, Center Frequency 1747 MHz, Insertion Loss 3.2 to 4.0 dB, Upper Rejection 8 dB 1805 - 1880 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM1747S163 can be seen below.