The BFE-1904-22 from ESJ Technology is a Band Pass Filter with Frequency 1893 to 1915 MHz, Center Frequency 1904 MHz, Insertion Loss 1.1 dB, Rejection 47 dB, Upper Rejection 47 dB @ 1925 to 1980 MHz. Tags: Module with Connectors. More details for BFE-1904-22 can be seen below.