The AM1950B1278 from Anatech Electronics is a Band Pass Filter with Frequency 1.92 to 1.98 GHz, Bandwidth 60 MHz, Center Frequency 1950 MHz, Insertion Loss 1.7 dB, Rejection 28 to 70 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1950B1278 can be seen below.