Fariedl Ultrasonic mosquito repellent (1 piece) Coil  (1 ml)

Ultra-wide coverage area: A single device covers 1,600 square feet (approximately 149 square meters). With enhanced dual speakers and 3D surround ultrasonic technology, full-area protection can be achieved even in large apartments or open spaces. Principle of physical sound wave repellent: Continuously changing ultrasonic waves stimulate and destroy the nervous systems of pests and rodents, and repel mice, cockroaches, mosquitoes, bats and other harmful organisms from the source without chemical pollution. Safe and harmless to humans and animals: Ultrasonic frequencies have no adverse effects on the human body and pets (cats, dogs, etc.). There is no need to place toxic baits or mousetraps to avoid the risk of accidental eating and accidental injury. The elderly and children can also use it with peace of mind. 3D surround protection without dead corners: Dual speakers form a stereo sound field, allowing ultrasonic waves to evenly spread to the corners of the room, reducing blind spots and improving comprehensive protection. Maintenance-free and long-term effective: plug and play, no need to frequently replace consumables, the ultrasonic wave continues to be effective, low long-term use cost, suitable for continuous protection in homes, shops, warehouses and other scenes.