Keep small rodents and mice away from your home or vehicle with this convenient repeller. This compact device is designed for indoor use or inside a vehicle. It uses flashing lights and ultrasonic frequencies that are almost imperceptible to the human ear to repel small rodents and mice. Plus, the frequencies change to ensure that rodents do not become accustomed to the sound. This ultrasonic pest repeller for mice can be charged three different ways. Use 4 AA batteries (not included), using a USB cable (cable is included, but a USB wall adapter is not), or by connecting it to a vehicle battery with the included vehicle charging cable. If connected to the battery, the built-in vibrator sensor ensures that the device will only operate when the car is stationary.