The QBF-800-1200-45 from Qualwave is a Band Pass Filter with Frequency 0.8 to 1.2 GHz, Bandwidth 400 MHz, Center Frequency 1000 MHz, Insertion Loss 1 dB, Upper Rejection 45 [email protected] GHz. Tags: Module with Connectors. More details for QBF-800-1200-45 can be seen below.