The CBF01015085B from Cernex Inc is a Band Pass Filter with Frequency 1.27 to 1.29 GHz, Bandwidth 20 MHz, Insertion Loss 5 dB, Upper Rejection 85 dB at 1.36GHz, Lower Rejection 85 dB at 1.2GHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CBF01015085B can be seen below.