The QBF-2300-2500-45 from Qualwave is a Band Pass Filter with Frequency 2.3 to 2.5 GHz, Bandwidth 200 MHz, Center Frequency 2400 MHz, Insertion Loss 3 dB, Upper Rejection 45 [email protected] GHz. Tags: Module with Connectors. More details for QBF-2300-2500-45 can be seen below.