The AM2050-2450D1121 from Anatech Electronics is a RF Duplexer with Frequency 1900 to 2200 MHz / 2400 to 2500 MHz, Band 1 1900 to 2200 MHz, Band 2 2400 to 2500 MHz, Power 2 W, Insertion Loss 1.5 dB. Tags: Surface Mount, Ceramic. More details for AM2050-2450D1121 can be seen below.