The QMWSD-D84 from Qualwave is a Waveguide Switch with Frequency 0.8 to 2 GHz, Insertion Loss 0.25 dB, Isolation 50 dB, Operating Temperature -40 to 85 Degree C, Storage Temperature -50 to 80 Degree C. Tags: Manual. More details for QMWSD-D84 can be seen below.