Ultrasonic Technology Ultrasonic Mouse Repeller uses bionic electromagnetic waves to disrupt the hearing and nervous system of pests, making them feel uneasy and gradually running away. < p>Working frequency The effective working frequency of the ultrasonic rodent car is 12kHz-25kHz. The ideal car rodent plug-in reader keeps mice away from your car. Easy to use This ultrasonic mouse is hardwired and powered by your vehicle’s battery . It’s convenient, efficient and environmentally friendly. Protects cables, wires and other rubber parts, giving you peace of mind. protect your car from rodent damage. Attention This unit is supplied with mounting hardware and wiring to connect to the car’s electrical circuit, it will work when vehicles will turn off and be stopped when the engine is running. Safety and Environment Ultrasonic Pest Repeller is 100% harmless to human body. The mouse repellent is made of environmentally friendly, non-toxic and harmless materials, and can be used with