Warning horn designed for use in cars, excavators, construction machinery, special vehicles, parking lots, and various large container transport vehicles. Nylon alarm horn, sturdy and durable. Compatible with all DC 12-80V vehicles. Loud sound with a volume of 105 dB. This vehicle reversing alarm emits a loud, attention-grabbing beep, providing enhanced audibility in real-world conditions. Practical and easy to install. Automatically adapts to vehicle voltage ranges from 12 to 80 volts. Features a universal mounting bracket with slotted holes for flexible installation on heavy-duty vehicles. High safety performance. Offers protection in case of incorrect or reversed wire connection. This 105 dB backup alarm is built for heavy-duty and commercial applications, ideal for trucks and cargo vehicles. Automatically adjusts to vehicle voltage ranges from 12 to 80 volts. Equipped with a universal mounting bracket and slotted holes for convenient and secure mounting on heavy vehicles. Widely used in cars, excavators, construction equipment, special vehicles, parking areas, and large container transport vehicles.