The TWFCB-917.5M05-C06M40-N03 from Techniwave is a Band Pass Filter with Frequency 915 to 920 MHz, Bandwidth 5 MHz, Center Frequency 917.5 MHz, Insertion Loss 2.8 dB, Upper Rejection 40 to 60 dB @ 923 MHz, 925 MHz. Tags: Module with Connectors. More details for TWFCB-917.5M05-C06M40-N03 can be seen below.