The WR28 Sheltered from Sector Microwave Industries is a Waveguide Switch with Frequency 26.5 to 40 GHz, Insertion Loss 0.15 dB, Isolation 55 dB, Supply Voltage -54 to 32 V, Current 0.5 to 1.5 A. Tags: Motorized. More details for WR28 Sheltered can be seen below.