The SF1189B-1 from Murata is a Band Pass Filter with Frequency 261.5 to 298.5 MHz, Bandwidth 18.5 MHz, Center Frequency 280 MHz, Insertion Loss 8.3 to 10 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, Ceramic Filter. More details for SF1189B-1 can be seen below.