The QBF-606-678-40 from Qualwave is a Band Pass Filter with Frequency 606 to 678 MHz, Bandwidth 72 MHz, Center Frequency 642 MHz, Insertion Loss 1.5 dB, Upper Rejection 30 [email protected] to 3 GHz. Tags: Module with Connectors. More details for QBF-606-678-40 can be seen below.