The QBF-4400-4600-45 from Qualwave is a Band Pass Filter with Frequency 4.4 to 4.6 GHz, Bandwidth 200 MHz, Center Frequency 4500 MHz, Insertion Loss 1.15 dB, Upper Rejection 45 to 80 dB. Tags: Module with Connectors. More details for QBF-4400-4600-45 can be seen below.