If the Electronic Pest Control Products cover 3,500-5,000 Sq Ft. Why do you recommend multiple units?

The Electronic Pest Control Products do cover 3,500- 5,000 Sq. Ft., we recommend using more than one unit for a couple reasons. It doesn't matter what Electronic Pest Control unit on the market if they use Ultrasonic sounds the ultrasonic sounds are only effective in the living space where the unit is placed and won't reach around walls and into other rooms. By using multiple units you are able to strategically place the units through out your home or office and effectively distribute the Ultrasonic Pest Control through out the structure, optimizing your overall Electronic Pest Control Pest Repelling Power. If you have a multi level structure it is good to place at least one unit on each level. The Electromagnetic feature will effectively travel through out your home or office from a single unit. We want to optimize your overall results and it has been our experience that more than one unit in use simultaneously presents greater results. One unit is better than no units but multiple ...  more