The QBF-1390-1410-80 from Qualwave is a Band Pass Filter with Frequency 1.39 to 1.41 GHz, Bandwidth 20 MHz, Center Frequency 1400 MHz, Insertion Loss 2 dB, Upper Rejection 80 [email protected] GHz. Tags: Module with Connectors. More details for QBF-1390-1410-80 can be seen below.