The BFCN-2975 from Mini Circuits is a Band Pass Filter with Frequency 2.57 to 3.44 GHz, Bandwidth 870 MHz, Center Frequency 2975 MHz, Insertion Loss 2.2 to 3 dB, Rejection 20 dB @ DC-1700 and 4000-7500 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-2975 can be seen below.