The BFE-1747-75 from ESJ Technology is a Band Pass Filter with Frequency 1710 to 1785 MHz, Center Frequency 1747.5 MHz, Insertion Loss 1 dB, Rejection 30 dB, Upper Rejection 30 dB@1795 to 2500MHz. Tags: Module with Connectors. More details for BFE-1747-75 can be seen below.