The QBF-890-910-60 from Qualwave is a Band Pass Filter with Frequency 0.89 to 0.91 GHz, Bandwidth 20 MHz, Center Frequency 900 MHz, Insertion Loss 1.5 dB, Upper Rejection 60 [email protected] to 2 GHz. Tags: Module with Connectors. More details for QBF-890-910-60 can be seen below.