Eastoan PLZY-001 Ultrasonic Mice Repellent Plug in Pest Control-Insect, Sold-Out 1 LATEST ULTRSONIC TECHNOLOGY WITH UPGRADED CHIP -- Adopting the latest ultrasonic chip, the ultrasonic pest repeller repels mouserats, flies, mosquitoes, spiders, fleas, cockroaches, ants by affecting their auditory and nervous system to make them uncomfortable, which will keep them away from your home once and for all. It is a rather humane way to solve pest