The SF2161E from Murata is a Band Pass Filter with Frequency 2.58 to 2.72 GHz, Bandwidth 70 MHz, Center Frequency 2650 MHz, Insertion Loss 2 to 3.5 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for SF2161E can be seen below.