The RSD-1900.000-2017.500-1511-TR from Raltron is a Diplexer with Frequency f1 1880 to 1920 MHz, Frequency f2 2010 to 2025 MHz, Power 20 dBm, Attenuation 4 to 48 dB, Attenuation f1 8 to 44 dB. Tags: Surface Mount, SAW. More details for RSD-1900.000-2017.500-1511-TR can be seen below.