Ultrasonic Technology - Ultrasonic mouse repellent uses bionic electromagnetic waves to disrupt pests' hearing and nervous system, making them feel uncomfortable and gradually running away. Working frequency - The effective working frequency of the ultrasonic car rodent killer is 12 kHz to 25 kHz. The ideal car rodent killer plug-in player keeps mice away from your car. Easy to use - This mouse with ultrasonic is hard-wired 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 of your car from damage by rodents. Warning - This unit is supplied with mounting hardware and wiring to connect to the car's electrical circuit, it will run when the vehicles shut off and will shut off when the engine is running . Safety and environment - The Ultrasonic Pest Repeller is 100% harmless to the human body. The mouse repellent is made of environmentally friendly materials, non-toxic and harmless, and can be used with confidence. Product Description Operation Mode: Low Voltage Alarm: When the power supply voltage is lower than 9.2 V, the product enters the alarm mode and emits a 1Hz alarm sound, which will last forever. In this case, the product does not work. Power-on self-test: When the initial power is turned on, the product will enter self-inspection. First, the red light flashes three times, then the white light flashes three times, then the alarm sounds. Working process: 1-15s, the light red flashes three times, then the 12k-25kHz ultrasonic wave is emitted, accompanied by the flashing white LED. 16-30 years, relief product. 31 to 50 seconds, repeating the process for 1 to 15 seconds. 51s-1min 10s, product standby. 1min 11s-1min 40s, repeating the process for 1-15s. After performing the above actions, stop 1min. Then repeat the above actions twice, stopping at 3 minutes and 5 minutes respectively. Vibration induction: when the supply voltage is higher than 9, 2 V, the product enters working mode. When the product detects car vibration, it will automatically stop working. 5 minutes after the car is stopped, the product will automatically start and resume operation. Installation method: Open the engine hood of the car, fix the product in a correct position inside the cabin, then connect the end of the red line with the fuse to the positive pole of the car battery, and the black wire to the negative pole. Mice, squirrels, minks, chipmunks and other destructive rodents often hide under the hoods of vehicles and damage wiring, cables and other expensive components. Sending sound and ultrasonic waves which cause their intense hearing pressure and the LED strobe lights to direct their vision, create a difficult environment under the hood for the survival of animals or pests and force them to move forward and escape from your car. modified ultrasonic pulses (inaudible) 2 LED strobe lights easy to install Power button /shutdown Low power consumption Low battery alarm Ultrasonic speaker (audio) test mode Rodent-damaged engine cables hide under the hood, especially in cold and spring, Because car engines are usually warm, dry and undisturbed, Provides ideal shelter for feeding, rest or spawn Once there, the creatures can do quite a bit of damage to the car. Motor cables are particularly vulnerable to rodents. This can cause a short if a rodent bites the insulation covering the wire, causing costly motor damage.