Ultrasonic Pest Repeller Indoor Use Only No Sound, No Chemicals, No Poisons and Odorless Specifications: Power rate: 3-5W Power source: 90V-250V Operating temperature: 0-40 Ultrasonic Frequency: 22-65KHz Effective coverage area: 800 - 1,200 sq ft Repels Mice, Insects, Bed bugs, Fleas, Bugs, Rodents, Roaches, Mosquitoes, Ants,Spiders, Rats, Fruit Flies, other insects and rodents indoor Package 6 x Ultrasonic Pest Repeller 1 x Specification Feature 1. Simply plug the repeller into a standard wall socket and it will start to work. It just repels insects and rodents from your home, so there will be no dead bodies. 2. The repeller should be installed at 50~150cm away from the floor and vertical to the floor. The repeller should not be plugged around carpets, curtains, etc. 3. To increase the effect, one room one repeller is recommended. And for larger rooms like warehouses, two or more repellers will be needed. 4. The repeller works 24 hours a day, 7 days a week all year round. Best results will be seen after continuous use for 2~3 weeks. 5. Please don't worry that the mice and vermin will increase at the beginning, because they are trying to run away from your house after being attacked by the ultrasonic. 6. The repeller is safe to use around: humans, dogs, cats, birds, fish, and rabbits. However, it is not recommended for pets like: mice, rats, hamsters, gerbils, guinea, pigs, tarantulas, chinchilla, and other rodent-type pets. 7. The first time switch turns off the lights. The second time to turns on the light, for long-term use it's advised to turn on the light for a better effect of repelling mosquitoes.