Under hood animal repellent, safety and eco-friendly, effectively protects your car engine cables and make driving . Adopt frequency conversion ultrasonics, work with flashing lights and alarm sound, which can interfere with rodents' hearing and visual systems, causing them to flee in discomfort. Support 2 power supplying methods, 3 * AA battery(Installed in the machine) and car battery, you can choose according to your needs, it is convenient and practical. Made of high-quality retardant material, it is effective in high temperature resistance, with nice durability, and protects the vehicle, so you can use it with confidence. It can be connected to 12-24V car battery, suitable for car, truck, SUV, etc. It can automatically recognize engine starts and stop, saving energy. Without harmful chemicals, it can be used not only in vehicle, but also in warehouse, kitche, garages, granaries, attics, offices, etc. Transmit Frequency: 9-65kHz Power: 12-24V vehicle power/3 * AA battery(Install in the machine) Item Weight: 230g Color: Black Material: ABS Package Contents: 1 * Mice Repeller(With 3 AA batteries) 1 * USB Charging Cable 1 * Car Power Cable 6 * Cable Ties 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.