The QBF-2700-3500-60 from Qualwave is a Band Pass Filter with Frequency 2.7 to 3.5 GHz, Bandwidth 800 MHz, Center Frequency 3100 MHz, Insertion Loss 0.9 dB, Upper Rejection 60 [email protected] GHz. Tags: Module with Connectors. More details for QBF-2700-3500-60 can be seen below.