This Electromagnetic and Ultrasonic Pest Repeller keeps pests away using innovative technology, rather than harmful toxic chemicals. Get the eco friendly alternative to dealing with pests with this unique pest repeller!Repel pests fast and clean with the power of SOUND! It's Dual Technology Electronic Pest Control featuring Ultrasonic and Electromagnetic Technology - by combining two technologies in one product, this is the most powerful product available for repelling basic pests, rodents and some spiders. This repeller plugs directly into wall outlet, no cords needed! The LED's provide up to 100,000 hours of use. Uses just 7.5 watts of electricity and also acts as a night light! Each unit will cover up to 100 sq ft area, it is recommended that for maximum coverage and results, to use one unit per room, or a minimum of two per floor. 12 volt.