Features: Back-up alarm is made for heavy-duty and commercial use, best for industrial heavy duty commercial construction vehicles. Produces a powerful beeping sound that is 110 decibel (110 5), it will be louder in practical use. Suitable for any 12-24volt vehicle. Warning alarm horn is mounting bracket with slotted holes,can be mounted in many places of truck,car,excavators,construction machinery,special vehicles,parking and a variety of large vehicles container vehicles reminder. brand new and high quality Easy to install, universal mounting bracket with slotted holes. It can be mounted anywhere in your heavy-duty vehicle. Specifications: Material:Plastic Size:Approx.98x68mm/3.86x2.68in Voltage:12-24V Loudness:1105 Db Type:Reticulated,Straight Line,Round,Rectangle Net Weight:300g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Backup Alarm