The AM2850B1562 from Anatech Electronics is a Band Pass Filter with Frequency 2.8 to 2.9 GHz, Bandwidth 100 MHz, Center Frequency 2850 MHz, Insertion Loss 4 dB, Rejection 40 to 60 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2850B1562 can be seen below.