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, providing a clear reversing alert. The backup alarm emits a powerful 105-decibel beep, effective in real-world conditions. Practical and easy to install. Automatically adapts to vehicle voltage ranging 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 audible warning alarm is built for heavy-duty and commercial applications, ideal for trucks and cargo vehicles. Automatically adjusts to vehicle voltage from 12 to 80 volts. Equipped with a universal mounting bracket and slotted holes, it can be installed in various positions on heavy vehicles, offering convenience and simple setup. Suitable for use in cars, excavators, construction machinery, special vehicles, parking lots, and large container transport vehicles.