The SF2133E from Murata is a Band Pass Filter with Frequency 1.67 to 1.82 GHz, Bandwidth 75 MHz, Center Frequency 1745.5 MHz, Insertion Loss 4 to 4.1 dB, Power 0.003 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for SF2133E can be seen below.