BOTAO Working principleThis product uses frequency-converted ultrasonic waves to effectively stimulate the nerves and auditory systems of mice within a controllable range to expel them. Smart On/Off - Automatically sense the running status of the car, and stop working automatically after the car starts. Automatically start working after 5 minutes of parking. Material - The precise fusion of ABS material and flame retardant material ensures proper operation in the engine bay. All-round protection - can cover the whole car to prevent mice from causing damage to the car line. Safety - Ultrasonic will not disturb people or pets, will not kill pests and rats, just drive them away without worrying about the death of pests in the car. Quantity: 1 Size: 8.4*8*3.1CM Color: Black