The SF2331B from Murata is a Band Pass Filter with Frequency 245.4 to 246.6 MHz, Bandwidth 0.6 MHz, Center Frequency 246 MHz, Insertion Loss 5 to 6.5 dB, Operating_Temperature -20 to 70 Degree C. Tags: Surface Mount, Ceramic, Surface Mount, Ceramic Filter. More details for SF2331B can be seen below.