The SF2158E from Murata is a Band Pass Filter with Frequency 2.47 to 2.61 GHz, Bandwidth 70 MHz, Center Frequency 2535 MHz, Insertion Loss 2.2 to 3.6 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for SF2158E can be seen below.