The SF18-1900BASUA1 from KYOCERA is a Diplexer with Frequency f1 1880 to 1920 MHz, Frequency f2 2555 to 2655 MHz, Power 0.02 to 0.79 W, Attenuation 5 to 60 dB, Attenuation f1 20 to 60 dB. Tags: Surface Mount, SAW. More details for SF18-1900BASUA1 can be seen below.