[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 compatible your vehicle. [360 Wide Coverage] The repeller covers up to 300 square feet, providing protection compatible the entire car repels a wide range of animals, including mice, rats, squirrels, the repellent is designed compatible vehicles, but can be used anywhere such as garage, barn, attic and other places compatible more purposes. [Energy Saving] Attach the repellent under the hood using the included zip tie and turn on the switch. Automatically enters standby mode when the car is in motion. After the car has been stationary compatible 10 minutes, the rodent repellent automatically turn on and enter working mode. [Wide Applications] The ultrasonic mouse repellent emits a combination of 18-36kHz ultrasounds and LED strobe lights causing them to become and eventually leave your car. If you have a serious rodent infestation, place multiple repellers facing areas where the rats are active to maximize the deterrent effect. Power Supply:4 x AA batteries(Not included batteries) Colour:Black Material:Plastic Package Contents: 1 * Rodent Repellent Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.