The AM1565B1204 from Anatech Electronics is a Band Pass Filter with Frequency 1.51 to 1.61 GHz, Bandwidth 100 MHz, Center Frequency 1565 MHz, Insertion Loss 1 dB, Upper Rejection 15 dB 1865 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1565B1204 can be seen below.