The AE91-165DB5239 from Anatech Electronics is a RF Duplexer with Frequency 33 to 180 MHz / 190 to 3000 MHz, Band 1 33 to 180 MHz, Band 2 190 to 3000 MHz, Insertion Loss 1.25 to 2 dB, Attenuation 50 to 66 dB. Tags: Module with Connectors. More details for AE91-165DB5239 can be seen below.