Specification: Power supply: AC90-250V Frequency: 50-60hz Power consumption: 4-6w Use range: about 120-1502 Size: 92*73*63mm Use range: about 120-150m2 Scope of action: can repel mice, mosquitoes, beetles, flies, ants, bats Warm Tips: Please use the low frequency mode when you are in the room. Low frequency mode has no noise or a little noise but people can't hear it. If you want better results, you can use the high-frequency mode when you are away from home. It's more powerful when using high frequency mode, but people can hear it. Innovative Frequency Conversion Technology: This indoor tonic emits invisible electromagnetic waves to repel insects, mice, rats, mosquitos, ants, spiders, cockroaches and other insects. No need to kill them. Please note that our ultrasonic repellent will work within 2 to 4 weeks, depending on the number of infestation. Then we can say goodbye to vermin and rats. Plug and Play Full Coverage: The ultrasonic insect repellent can be used in various places such as bedrooms, bathrooms, garages, kitchens, offices, warehouses, etc. Using imitation sound wave technology and the latest ultrasonic insect repellent, the effective area can reach 1300-1650 square meters. NotePlease make sure the vertical installation is 7-31 inches from the ground. And make sure there are no obstacles like curtains or cabinets in front of the repellent.