The WRCT5-877.5-880-883-885.5-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 880 to 883 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 WRCT5-877.5-880-883-885.5-30 can be seen below.