The BFCN-2850 from Mini Circuits is a Band Pass Filter with Frequency 2.75 to 2.95 GHz, Bandwidth 200 MHz, Center Frequency 2850 MHz, Insertion Loss 4 dB, Rejection 20 dB @ 1500 and 4300 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-2850 can be seen below.