The WBCTB3-899-909-913-923-40 from Wainwright Instruments is a Band Pass Filter with Frequency 909 to 913 MHz, Bandwidth 4 MHz, Center Frequency 911 MHz, Insertion Loss 1.25 to 2 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB3-899-909-913-923-40 can be seen below.