The BFCN-2491+ from Mini Circuits is a Band Pass Filter with Frequency 1950 to 3190 MHz, Center Frequency 2491 MHz, Insertion Loss 1.2 to 3 dB, Upper Rejection 20 to 29 dB, Lower Rejection 20 to 22 dB. Tags: Ceramic, Ceramic Filter. More details for BFCN-2491+ can be seen below.