The BPF-277-475-L9 from COTS RF is a Band Pass Filter with Frequency 39.5 to 514.5 MHz, Bandwidth 475 MHz @ 1 dB, Center Frequency 277 MHz, Insertion Loss 1 dB, Rejection 30dB @ 40 & 523 MHz. Tags: Module with Connectors. More details for BPF-277-475-L9 can be seen below.