The CBF01014045B from Cernex Inc is a Band Pass Filter with Frequency 1.12 to 1.25 GHz, Bandwidth 121.9 MHz, Insertion Loss 4 dB, Upper Rejection 45 dB at 1.31GHz, Lower Rejection 50 dB at 1.23GHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CBF01014045B can be seen below.