About MASSWELL MASSWELL based in HONGKONG, one of most famous economy&financial city in southeast Asia, will always keep its firm perspectives from it started to run in the year of 2006: ¡±TRY OUR BEST TO PRODUCE AND DELIEVER THE BEST PRODUCTS TO OUR CUSTOMERS ALL OVER THE WORLD!¡± We will try our best to make our customer 100% satisfaction! Why This Is The BEST Pest Repeller On Amazon: THIS pest repellent device can actually be adjusted to a HIGH or LOW ultrasonic frequency (as you see fit). Since every human's hearing is different, you can be sure that these units won't bother you! Plus, it covers significantly more area than any other pest control device. It just works. This is ALSO the most humane method for being pest free; it doesn't kill rodents, but rather creates an environment that is uncomfortable for them, so they simply leave. You won't hear a thing as pests are driven from your home by the combined power of ultrasonic and electromagnetic functions. Covers up to 6000sq ft.
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