The QBF-4800-5000-45 from Qualwave is a Band Pass Filter with Frequency 4.8 to 5 GHz, Bandwidth 200 MHz, Center Frequency 4900 MHz, Insertion Loss 1.15 dB, Upper Rejection 45 to 80 dB. Tags: Module with Connectors. More details for QBF-4800-5000-45 can be seen below.