The LDX-390/440-1N from Leader-MW is a RF Duplexer with Frequency 380 to 470 MHz, Band 1 380 to 400 MHz, Band 2 410 to 470 MHz, Insertion Loss 0.7 dB, Attenuation 40 dB. Tags: Module with Connectors. More details for LDX-390/440-1N can be seen below.