Smart and Durable Protection: Ultrasonic pest repeller use intelligent frequency conversion technology and heat dissipation system can continuously release different frequencies ultrasonic waves 24 hours a day, prevents pests from developing immunity and adaptabilityEnvironment-Friendly & 100% Safe: Repellent does not produce chemicals, poisons, odors, and radiation, which is safe for children and pets. (It is not recommended for rodent pets such as guinea pigs, hamsters, mice)Fully Effective Coverage: In order to achieve the best use effect, please use this product indoors. One 5W repellent can provide wide coverage of 1200 square feet (without obstacles)Humanized Design: Repellent is very easy to install, just plug it in a wall socket 8 to 31 inches from the ground. There is no noise during use and provides a nice light in the dark.Package Contents2 x Repeller1 x User Manual"Material: ABS PlasticOutput Power: 3-5WVoltage: 90V-250VOperating Temperature: 0-40 Degrees CelsiusProduct Size: 8.5 x 6.5 x 5.5cmPackage Size: 12 x 7 x 5.5 cm