The AM1950B256 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 2.4 dB, Upper Rejection 15 dB @ 2000 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1950B256 can be seen below.