Are you bothered by various parasites? Ultrasonic Pest Repeller uses automatic frequency conversion ultrasonic technology to emit 20~55KHZ ultrasonic waves to stimulate the hearing and nervous system of mosquitoes, cockroaches, mice, mites and other pests to repel effectively pests in your home! Give you a clean and tidy home! 🏡 An ongoing process to fend off pests ✅Week 1 rapid impact and flight from refuge ✅Week 2 non-immune and nervous system damage ✅Week 3 at 4 intolerable and flee the house forever ✅To prevent the pest from coming back, continued use is recommended Repel many types of pests 🚫Effective against mice, rats, mosquitoes, cockroaches, moths, ants, spiders, bedbugs, and more. 🚫Suitable anywhere: apartment, warehouse, office, restaurant, school, garage, gym , etc. Note: ① Ultrasonic waves do not fray between walls. For best results, install 1 ultrasonic pest control device in each room. For large areas, 2 units may be required. ② Keep doors and windows closed to