The AM2212-2287D779 from Anatech Electronics is a RF Duplexer with Frequency 2203 to 2225 MHz / 2275 to 2300 MHz, Band 1 2203 to 2225 MHz, Band 2 2275 to 2300 MHz, Power 3 W, Insertion Loss 2 to 20.5 dB. Tags: Surface Mount, Ceramic. More details for AM2212-2287D779 can be seen below.