The AM1600B991 from Anatech Electronics is a Band Pass Filter with Frequency 1.57 to 1.63 GHz, Bandwidth 62 MHz, Center Frequency 1600 MHz, Insertion Loss 4 dB, Upper Rejection 40 dB 1690 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1600B991 can be seen below.