The RF3608D from Murata is a Band Pass Filter with Frequency 406.9 to 445.9 MHz, Bandwidth 19.5 MHz, Center Frequency 426.4 MHz, Insertion Loss 1.8 to 2.8 dB, Power 0.031 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for RF3608D can be seen below.