The AM3394B1219 from Anatech Electronics is a Band Pass Filter with Frequency 3.388 to 3.4 GHz, Bandwidth 12 MHz, Center Frequency 3394 MHz, Insertion Loss 3.2 dB, Rejection 20 to 40 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM3394B1219 can be seen below.