The B056MB5S from Knowles is a Band Pass Filter with Frequency 11.6 to 12.1 GHz, Bandwidth 500 MHz, Center Frequency 5.6 GHz, Insertion Loss 1.75 to 2 dB, Rejection 45 to 50 dB. Tags: Surface Mount, Ceramic Filter. More details for B056MB5S can be seen below.