Vermatik Ultrasonic and Electromagnetic Repeller
The Vermatik ultrasonic and electromagnetic household repeller can cover up to 60 sq meters. It's designed to repel crawling insects and rats and mice.
The repeller emits ultrasonic sound waves inaudible to humans but very irritating to cockroaches, mice, spiders and rats. It also emits electromagnetic waves into the house electrical circuitry that will disturb pests with in 1 meter or your wiring.