The RF3319E from Murata is a Band Pass Filter with Frequency 868.15 to 869.75 MHz, Bandwidth 0.8 MHz, Center Frequency 868.95 MHz, Insertion Loss 2.4 to 4 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for RF3319E can be seen below.