The RSD-1747.500-1842.500-1814-TR from Raltron is a RF Duplexer with Frequency 1710 to 1785 MHz / 1805 to 1880 MHz, Band 1 1710 to 1785 MHz, Band 2 1805 to 1880 MHz, Power 30 dBm, Insertion Loss 2.2 to 3.4 dB. Tags: Surface Mount. More details for RSD-1747.500-1842.500-1814-TR can be seen below.