The LDX-417.5/444.5-Q6 from Leader-MW is a RF Duplexer with Frequency 411.5 to 450.5 MHz, Band 1 411.5 to 423.5 MHz, Band 2 438.5 to 450.5 MHz, Insertion Loss 1.45 dB, Attenuation 100 dB. Tags: Module with Connectors. More details for LDX-417.5/444.5-Q6 can be seen below.