Features: Under hood animal repellent, safety and eco-friendly, effectively protects your car engine cables and make driving safer. It emits ultrasonics waves and flashing lights that interfere with rodents’ hearing and visual systems, causing them to flee in discomfort. Support 3 power supplying methods, AA battery(not included)/car battery/USB cable, 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 V car battery, suitable for car, truck, SUV, etc. It can automatically recognize engine starts and stop. Without harmful chemicals, it can be used not only in vehicle, but also in garages, granaries, attics, offices, etc. Specifications: Color: Black Material: ABS Transmit Frequency: 18kHz-36kHz Power: 4 * AA battery, 5-12 V adaptor or 12 V vehicle power(Batteries and