The WRCT5-834-836.5-839.5-842-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 836.5 to 839.5 MHz, Bandwidth 3 MHz, Insertion Loss 0.5 to 1 dB, Rejection 30 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT5-834-836.5-839.5-842-30 can be seen below.