The AM1842S164 from Anatech Electronics is a Band Pass Filter with Frequency 1.81 to 1.88 GHz, Bandwidth 75 MHz, Center Frequency 1842.5 MHz, Insertion Loss 2.3 to 4 dB, Upper Rejection 30 dB 1920-3120 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM1842S164 can be seen below.