[Safe and No Radiation] - ultrasonic rodent repeller is made of high quality ABS material, high temperature resistant, non-toxic and tasteless, it will not harm your car, human body and pet of pet. [Wide range of use] - Ultrasonic waves can emit up to 40, For indoor spaces like attics, stables, barns, garage, carports, basement, gazebos , firm. [Ultrasonic Repellent] - The effective ultrasonic drive can emit ultrasonic waves with different frequencies, which is almost imperceptible to human ears. Light flashes can keep rodents away from your vehicle. [Installation] - Connect to DC5-12V vehicle power supply using the included cable, connect the two connectors to the power supply of the vehicle. [Intelligent Power Saving] - If vibration is detected when the vehicle is started, the mouse repeller will go into sleep state. When the car stops moving, the electronic rodent repellent will enter working mode.