The QBF-2500-2700-30 from Qualwave is a Band Pass Filter with Frequency 2.5 to 2.7 GHz, Bandwidth 200 MHz, Center Frequency 2600 MHz, Insertion Loss 1.3 dB, Upper Rejection 30 [email protected] to 6 GHz. Tags: Module with Connectors. More details for QBF-2500-2700-30 can be seen below.