The BFCN-5540+ from Mini Circuits is a Band Pass Filter with Frequency 4620 to 6640 MHz, Center Frequency 5540 MHz, Insertion Loss 1.2 to 4 dB, Upper Rejection 13 to 30 dB, Lower Rejection 17 to 25 dB. Tags: Ceramic, Ceramic Filter. More details for BFCN-5540+ can be seen below.