Doff Ultrasonic Spider Repeller

Doff Ultrasonic Spider Repeller uses a combination of ultrasound and electromagnetic interference. It deters unwanted rodents from your home safely and humanely. The repeller repels the spider by emitting high frequency pulse acoustic waves and electromagnetic waves which spiders hate. The unit operates at frequencies that are too high for humans, cats and dogs to hear, but are within the hearing range of spiders. The unit should be set to the PET-SAFE mode when it is to be used around rodent pets such as gerbils, hamster, guinea pigs or rabbits. Category - Pest and Bug Treatments.