The QBF-2000-3000-50 from Qualwave is a Band Pass Filter with Frequency 2 to 3 GHz, Bandwidth 1000 MHz, Center Frequency 2500 MHz, Insertion Loss 1 dB, Upper Rejection 50 [email protected] to 5 GHz. Tags: Module with Connectors. More details for QBF-2000-3000-50 can be seen below.