The 12V automotive pest repeller uses the principle of ultrasonic wave vibrations. Ultrasonic waves attack the auditory and nervous system of most pests, effectively deterring intruders. These high-frequency waves are beyond the range of audibility for the human ear and most domestic animals. Effectively deters: mice, rats, martens, polecats, weasels, and other rodents from under the car hood. Product Features: - harmless to the environment - deterrence using ultrasound (12-25kHz) and LED flashes - low energy consumption - 12V power supply - current consumption: operation - 40mA, standby mode: 5mA - switch - replaceable fuse - dimensions: 8x8.5x3.5cm - length. supplies: 30 cm - 2 cable ties for installation