The RSD-1900.000-2017.500-1511-TR-NS1 from Raltron is a Diplexer with Frequency f1 1880 to 1920 MHz, Frequency f2 2010 to 2025 MHz, Power 15 dBm, Attenuation 5 to 30 dB, Attenuation f1 15 to 30 dB. Tags: Surface Mount, SAW. More details for RSD-1900.000-2017.500-1511-TR-NS1 can be seen below.