Automatic frequency conversion technology: < / H3> the ultrasonic repeller has three wave bands: ultrasonic waves + sawtooth waves + bionic waves, the frequency will automatically change according to to the different ways of working. < / P> Notable effect < / H4> The number of rodents and insects can increase in the first few days. And the ultrasonic repeller will finally drive them away after 3-4 weeks. < / P> Wide application and coverage Ultrasonic repeller works in an indoor area up to 180 square meters, it can be used in homes, warehouses, offices, gardens, hotels, etc. < / P> Install one in each room for complete coverage. < / P> Principle of operation < / H4> Our ultrasonic repeller works by emitting high frequency sound waves. The sound is inaudible to humans and pets. The devices do not emit chemicals. < / P> < / B>
