Packrat and Rodent Deterrent Device, Model RC-2 Easy magnetic mount installation. May be left connected indefinitely with little drain on the cars battery. This is an LED device, not sonic! No special tools or skills required to install unit. Rid-as-rat is the ONLY manufacturer and direct seller of this item! Even though our stated warranty is 6 months, we stand behind our product well beyond that. DO NOT BE SCAMMED BY OFFERS OF EXTENDED WARRANTIES!