The TWFCB-921.5M13-C9.5M40-N03 from Techniwave is a Band Pass Filter with Frequency 915 to 928 MHz, Bandwidth 10 MHz, Center Frequency 920 MHz, Insertion Loss 2 to 3 dB, Upper Rejection 60 to 70 dB @ 935 to 960 MHz, 960 to 3000 MHz. Tags: Module with Connectors. More details for TWFCB-921.5M13-C9.5M40-N03 can be seen below.