Compact, heavy duty reversing alarm, with multi-voltage capacity. Suitable for all vehicles with voltage between 12V and 80V. Gives nearby vehicles and pedestrians warning that the vehicle is reversing, improving safety. Small design makes it unobtrusive. Extra loud alarm - volume 112dB at 1m. Fully sealed and waterproof. Includes over voltage and reverse polarity protection. Double bolt fixing. Ideal for commercial use.