Features 1.Loud Warning Aound: The backup warning alarm emits a powerful buzzing sound of 110±3db, ensuring that no one ignores it when you are reversing. It helps to immediately alert distant drivers and pedestrians, preventing accidents and reducing costs. 2.Easy Installation: The car reverse horn is easy to install, you just need to connect the positive wire of the screw terminal to the power wire of the reverse light or reverse switch mounted on the dashboard, then ground the wire (negative wire). It offers protection in case of reverse or incorrect wire connection. The reverse polarity protection activates the backup alarm when the reverse light is illuminated. 3.High Performance: This truck back up alarm utilizes excellent metal and ABSmaterial and ground connection terminals, ensuring high reliability, wear resistance, scratch resistance, dust resistance, fade resistance, impact resistance, and erosion resistance in various temperature environments. 4.Secure And Reliable: The backup reverse warning alarm plays a crucial role in ensuring safety by drawing immediate attention from others while reversing, thus helping to prevent accidents and minimize risks. 5.Wide Application: Suitable for universal 12V‑80V heavy duty vehicles and commercial applications, this vehicle backup alarm is ideal for trucks, cars, excavators, construction machinery, specialty vehicles, parking lots, and various large container vehicles. The universal mounting bracket with slotted holes allows for installation in multiple locations on vehicles. Specification Item Type: Truck Back Up Alarm Material: Metal, ABS Voltage: 12-80V Application: Forklifts, Trucks, Cars, etc. Package List 1 x ;Truck Back Up Alarm