The AD746-776D311 from Anatech Electronics is a RF Duplexer with Frequency 740 to 752 MHz (Rx) / 770 to 782 MHz (Tx), Band 1 740 to 752 MHz (Rx), Band 2 770 to 782 MHz (Tx), Insertion Loss 1.5 dB, Isolation 45 dB. Tags: Module with Connectors. More details for AD746-776D311 can be seen below.