The AM1587B1166 from Anatech Electronics is a Band Pass Filter with Frequency 1565 to 1610 MHz, Bandwidth Fo ± 22.5 MHz, Center Frequency 1587.5 MHz, Insertion Loss 4 dB, Rejection 22.5 to 42.5 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1587B1166 can be seen below.