The WVR-897.6B-30.2M01 from Wevercomm is a Band Stop Filter with Stopband Frequency 882.6 to 912.4 MHz, Bandwidth 29.8 MHz, Insertion Loss 2 dB, Rejection 40 dB Min @ 882.6MHz to 912.4MHz, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-897.6B-30.2M01 can be seen below.