The AM1575B1561 from Anatech Electronics is a Band Pass Filter with Frequency 1566.42 to 1584.42 MHz, Bandwidth 18 MHz(3 dB), Center Frequency 1575.42 MHz, Insertion Loss 4.5 dB, Rejection 20 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1575B1561 can be seen below.