The RF3501E from Murata is a Band Pass Filter with Frequency 826.1 to 906.1 MHz, Bandwidth 40 MHz, Center Frequency 866.1 MHz, Insertion Loss 3 to 4.5 dB, Power 0.031 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for RF3501E can be seen below.