The RDXA-R2180-T1690A from Raltron is a RF Duplexer with Frequency 1.657.5 to 1.7225 GHz / 2.147.5 to 2.2125 GHz, Band 1 1.657.5 to 1.7225 GHz, Band 2 2.147.5 to 2.2125 GHz, Insertion Loss 1.5 to 2 dB, Attenuation 50 dB. Tags: Surface Mount. More details for RDXA-R2180-T1690A can be seen below.