The BFCN-2900 from Mini Circuits is a Band Pass Filter with Frequency 2.7 to 3.1 GHz, Bandwidth 400 MHz, Center Frequency 2900 MHz, Insertion Loss 1.65 to 1.71 dB, Rejection 20 dB @ 1850 and 4200 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-2900 can be seen below.