The RF3181D from Murata is a Band Pass Filter with Frequency 916 to 917 MHz, Bandwidth 0.5 MHz, Center Frequency 916.5 MHz, Insertion Loss 2.5 to 4 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for RF3181D can be seen below.