Product Details: This reversing back up alarm is perfect for us in cars, utes, light vans, trucks, buses, coaches, forklifts and other machinery. The unit emits a loud buzzer that alerts pedestrians when the vehicle is reversing. Fully waterproof and withstands extreme temperatures. Easy installation using the universal mounting bracket design. Size: About 101*40*70mm Features: Loud Sound 105DB Waterproof Body Is Epoxy-Nylon Encapsulated Sealed From Dirt & Moisture Auto Multi Voltage From 12V - 24V (12V-48V) Low Current Draw Easy 2 Wire Connection Easy Mount Bracket Brand - Carbole Power Connection: Positive & Negative Terminals Sound Level: 102 ± 3dB Sound: Beep-Beep-Beep-Beep Package Include: 2Pcs item just like the photo