The LDX-TDA/TDB -1 from Leader-MW is a RF Duplexer with Frequency 1.88 to 2.025 GHz, Band 1 1.88 to 1.92 GHz, Band 2 2.01 to 2.025 GHz, Insertion Loss 0.6 dB, Attenuation 80 dB. Tags: Module with Connectors. More details for LDX-TDA/TDB -1 can be seen below.