2 Pcs Under Hood Rodent Repeller with Strobe Light & 3 Power Supply Methods, Professional Ultrasonic Mouse Repellent Rat Squirrel Deterrent for 12V Cars Trucks RV Engine Bay Warehouse AtticBrand: Jahy2Tech Features: Professional Under Hood Rodent Repeller: Rodent are very sensitive to environmental changes, especially to light and sound. The strong white light can stimulate the retina of mice, making them feel uneasy. And the auditory system of rodent is very developed and sensitive to ultrasound. This under hood rodent repeller uses variable frequency output technology, which can emit fluctuating ultrasound and flashing lights to