The AM427S461 from Anatech Electronics is a Band Pass Filter with Frequency 424.75 to 429.25 MHz, Bandwidth 4.5 MHz, Center Frequency 427 MHz, Insertion Loss 2.3 to 4 dB, Upper Rejection 40 dB 450-600 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM427S461 can be seen below.