CIVPOWER Ultrasonic Electronic Repellent Indoor Plug The chip in this CIVPOWER Ultrasonic Electronic Repellent Indoor Plug ($22 for four) helps keep away pests like rats, spiders, ants, cockroaches, mosquitoes, fruit flies, fleas, and so much more. Plus, it's safe around children and pets. Image Source: amazon.com CIVPOWER Ultrasonic Electronic Repellent Indoor Plug $22 from amazon.com Buy Now