Ultrasonic Pest Repeller - Electronic Pest Control Plug In For Insect - Home Pest Repellent - Repels Mosquitoes , Spiders , Bed bugs , Cockroaches , Mice , Fleas and some other rodent pests (6 Pack ) REPEL PESTS BY ULTRASONIC : Geekers pest repeller uses ultrasonic technology to drive away most kinds of flying and crawling pests such as mosquitoes , spiders , bed bugs , cockroaches , mice , fleas , fruit flies,etc, bringing you a clean house.