The BPF-1800-1000-L9 from COTS RF is a Band Pass Filter with Frequency 1300 to 2300 MHz, Bandwidth 1000 MHz @ 1 dB, Center Frequency 1800 MHz, Insertion Loss 1 dB, Rejection 15dB @ 1100 & 2500 MHz. Tags: Module with Connectors. More details for BPF-1800-1000-L9 can be seen below.