The WBCGV4-809.5-839.5-854.5-884.5-30-2 from Wainwright Instruments is a Band Pass Filter with Frequency 839.5 to 854.5 MHz, Bandwidth 15 MHz, Center Frequency 847 MHz, Insertion Loss 0.65 to 0.75 dB, Rejection 30 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCGV4-809.5-839.5-854.5-884.5-30-2 can be seen below.