1100% Safe & Eco-Friendly: Using our newest 2018 Repeller to instead of the harmful poisons, dangerous chemicals. Cause no harm for human body, 100% safe for kids and pets, leave no dead insects and messy house. Note:Typical results can take 2-3 weeks dep 2Efficiently Ultrasonic and ElectroMagnetic Technology: The pest repellent emits 2 kinds of frequency ultrasonic and electromagnetic wave automatically which is in-audible to human and pets ear, but will stimulate mice and other pests nervous system and 3Wide Coverage Area: This electronic pest repeller can affect cover 800~1200 square meters.Please note that ultrasonic waves cant travel through walls and solid stuff. So, we commend get one unit for each room, also additional units will be required in l 4Easy to Install: Just plug the ultrasonic pest control into the wall socket, simply press the switch, it works when the 2 LED lights are on. Note:Please install our pest repeller 31-47 inch away from the floor 5Package and Warranty: 2 x Ultrasonic Pest Repeller; Come with a full 365 days warranty, 30 days money back guarantee.