The BFCN-1855 from Mini Circuits is a Band Pass Filter with Frequency 1.79 to 1.92 GHz, Bandwidth 130 MHz, Center Frequency 1855 MHz, Insertion Loss 2.5 to 3 dB, Rejection 20 dB @ 1510 and 2810 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-1855 can be seen below.