The CBF01011040B from Cernex Inc is a Band Pass Filter with Frequency 1.76 to 1.19 GHz, Bandwidth 570.4 MHz, Insertion Loss 1 dB, Upper Rejection 55 dB at 2.492GHz, Lower Rejection 40 dB at 1.575GHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CBF01011040B can be seen below.