The BFCN-4440 from Mini Circuits is a Band Pass Filter with Frequency 4.2 to 4.7 GHz, Bandwidth 500 MHz, Center Frequency 4440 MHz, Insertion Loss 1 dB, Rejection 20 dB @ 2000 and 6750 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFCN-4440 can be seen below.