Product Features: Repels pests by continuously emitting powerful ultrasonic waves, completely inaudible to humans and animals. Non-toxic and harmless to humans and pets, making it an ideal alternative to toxic chemicals and dangerous traps. A single unit can protect an area of 80-120 square meters. Low power consumption, suitable for long-term operation. Does not interfere with the normal operation of radios, televisions, or other electronic devices. Specifications: Easy to use. Safe and environmentally friendly. Non-toxic and harmless to humans and pets. Protects an area of 80-120 square meters. Low power consumption, suitable for long-term operation. Powerful ultrasonic waves repel pests. Does not interfere with the normal operation of other electronic devices. This pest repeller is the most humane way to eliminate pests. Applicable pests: cockroaches, rats, spiders, mosquitoes, ants, bed bugs, fleas, flies. Specifications: Voltage: 220V; Power: 5W; Output frequency: 20Hz-45Hz; Shell material: ABS; Dimensions: 6 x 3 x 9 cm; Effective area: 80-120 square meters; Plug type: European standard plug; Package list: 4-pack ultrasonic pest repeller (including box); Notes: 1. Avoid installing on carpets, curtains, sound-absorbing materials, etc., otherwise the reduced sound pressure will affect the insect repellent effect. 2. There should be no large obstacles within 1 meter (do not install behind refrigerators, wardrobes, sofas, etc.). 3. It can be directly plugged into a 220V AC outlet within 1 meter. 4. There should be no large obstacles within 1 meter (do not install behind refrigerators, wardrobes, sofas, etc.). 5. It can be directly plugged into a 220V AC outlet within 1 meter. 6. Ambient temperature: 0-40℃. 7. An increase in the number of rodents and insects in the initial stage of use is normal, as they will leave their habitat after being driven away by the ultrasonic waves. It usually takes 3-4 weeks to see results.