The AD850-931D399 from Anatech Electronics is a RF Duplexer with Frequency 806 to 894 MHz (Rx) / 902 to 960 MHz (Tx), Band 1 806 to 894 MHz (Rx), Band 2 902 to 960 MHz (Tx), Power 50 to 250 W, Insertion Loss 1 to 1.5 dB. Tags: Module with Connectors. More details for AD850-931D399 can be seen below.