The RDXA-R2140-T1950A from Raltron is a RF Duplexer with Frequency 1.92 to 1.98 GHz / 2.11 to 2.17 GHz, Band 1 1.92 to 1.98 GHz, Band 2 2.11 to 2.17 GHz, Insertion Loss 2 dB, Attenuation 50 dB. Tags: Surface Mount. More details for RDXA-R2140-T1950A can be seen below.