[Mouse Repellent Effect] Utilizes variable frequency output technology to effectively prevent rats from entering the car and chewing on wires, without developing adaptability or immunity. Equipped with flashing LED lights that increase the repelling power when the variable frequency ultrasound is emitted. Features an alarm sound that is automatically triggered in car mode. [Multiple Charging Modes] 3 Installation ways, (1) use 4 x AA batteries(Not included batteries),(2) Connected to the vehicle battery with DC cable,(3) USB cable, Simply attach the repeller to the inside of the car hood with the included zip ties and turn it on. Made with high-quality materials, the repeller is built to last and provide long-term protection for your vehicle. [360° Wide Coverage] The repeller covers up to 300 square feet, providing protection for the entire car repels a wide range of animals, including mice, rats, squirrels, the repellent is designed for vehicles, but can be used anywhere such as