The WR28 Standard from Sector Microwave Industries is a Waveguide Switch with Frequency 26.5 to 40 GHz, Insertion Loss 0.15 dB, Isolation 50 dB, Supply Voltage -54 to 32 V, Current 0.5 to 1.5 A. Tags: Motorized. More details for WR28 Standard can be seen below.