The SF18-1900BASUB1 from KYOCERA is a Diplexer with Frequency f1 1880 to 1920 MHz, Frequency f2 2545 to 2655 MHz, Power 0.02 to 1.12 W, Attenuation 20 to 55 dB, Attenuation f1 30 to 55 dB. Tags: Surface Mount, SAW. More details for SF18-1900BASUB1 can be seen below.