The BFCN-3115 from Mini Circuits is a Band Pass Filter with Frequency 2.72 to 3.57 GHz, Bandwidth 850 MHz, Center Frequency 3115 MHz, Insertion Loss 1.7 to 3 dB, Rejection 20 dB @ DC-1850 and 4300-8160 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-3115 can be seen below.