1. Safe and Effective Control: This mouse repellent uses ultrasonic vibrations to effectively repel without harming or killing them. The frequency range of is safe for both humans and animals. 2. Prevent Vehicle Damage: This mouse repeller helps prevent damage caused by destructive rodents like mice, voles, squirrels, and chipmunks, protecting your vehicle's engine, wheels, and interior from expensive repairs. 3. Easy to Use: This repeller is easy to use. Simply turn it on, and it enters into a self-check mode before switching to the working mode, which automatically generates high-frequency sound waves to deter rodents and other . 4. Wide Application Range: This electronic rodent repellent is suitable for types and sizes of vehicles. It can also be used in homes, garages, warehouses, and other areas where may be present. Frequenz:12 kHz-25 kHz. Reichweite:40 m Induktionsmethode:Vibrationserfassung. Product application:Car Function:Rodent repellent, , marten repellent. Installation method: Open the car hatch and fix the product in a suitable position in the compartment, then use a fuse to connect one end of the red wire to the positive terminal of the car battery and the black wire to the negative terminal. When the switch button is turned on, the product enters the self-test mode and then enters the working mode Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:Black Material:ABS Package Contents: 1 * Ultrasonic Animal Repeller 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.