The CBF01015040B from Cernex Inc is a Band Pass Filter with Frequency 1.4 to 1.14 GHz, Bandwidth 256.9 MHz, Insertion Loss 5 dB, Upper Rejection 40 dB at 1.457GHz, Lower Rejection 45 dB at 1.37GHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CBF01015040B can be seen below.