Keep your vehicle protected from unwanted rodent visitors with this 2-pack of CRUS Ultrasonic Marten Repellers. These electronic deterrent devices are specifically designed to help prevent mice, martens, and other rodents from making themselves at home in your car's engine compartment. The units emit ultrasonic waves that create an inhospitable environment for pests while being inaudible to humans. Each device features a durable construction suitable for engine bay installation and comes with multiple mounting options. The repellers activate automatically when detecting movement, helping to protect your vehicle's wiring and components from costly rodent damage. This pack of two units allows you to create a more comprehensive coverage area. Simple to install and battery-powered, these repellers offer a practical solution for vehicle owners dealing with unwanted engine compartment visitors. Note that results may vary based on specific conditions and pest behavior patterns.