The RDXA-R858-T813A from Raltron is a RF Duplexer with Frequency 808 to 818 MHz / 853 to 863 MHz, Band 1 808 to 818 MHz, Band 2 853 to 863 MHz, Insertion Loss 2 dB, Attenuation 50 dB. Tags: Surface Mount. More details for RDXA-R858-T813A can be seen below.