FEATURES: 1. Ultrasonic technology: This indoor device emits invisible electromagnetic waves to repel insects, mice, rats, mosquitoes, ants, spiders, cockroaches, and other pests. 2. No harm to humans & pets: The ultrasonic sound is inaudible to people and household pets; an environmentally friendly alternative to harmful chemicals, poisons, and traps, with no unpleasant odor. 3. Large coverage area: The product is effective in indoor spaces up to 1600 sq. ft. It is widely used in homes, warehouses, offices, gardens, hotels, and more. 4. Easy to use: Simply plug the repellent into the socket. Ensure it is installed vertically 7-31 inches away from the floor. Specification: Material: ABS Size: 9cm*5.6cm*5cm Standard Wall Plug-In Output Power: 4-6W Package Included: 1PC Ultrasonic Pest Repeller Product type: Insect protection