The WVR-2535B-64.8M01 from Wevercomm is a Band Stop Filter with Stopband Frequency 2.503 to 2.567 GHz, Bandwidth 64.8 MHz, Insertion Loss 2 dB, Rejection 40 dB Min @ 2502.6MHz to 2567.4MHz, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-2535B-64.8M01 can be seen below.