The ADBF 4050/1700-A from ADMOTECH is a Band Pass Filter with Frequency 3.2 to 4.9 GHz, Bandwidth 1700 MHz, Center Frequency 4.05 GHz, Insertion Loss 0.5 dB, Power 1 W. Tags: Module with Connectors, Cavity Filter. More details for ADBF 4050/1700-A can be seen below.