Application: Buzzer warning alert mainly used for car, excavators, construction machinery, special vehicles, parking and a variety of large vehicles container vehicles reminder. Loud Sound Volume: 105db. Back up alarm for trucks can produces a powerful beeping sound that is 105 decibel, it will be louder in practical use. High Quality: Alarming horn made of nylon material, very sturdy and durable. Precision manufacturing ensures stable performance and long service life. Easy to Install: It can automatically adjust to a voltage range of 12-80 volt vehicles. With universal mounting bracket and slotted holes, it can be mounted anywhere in your heavy-duty vehicle. Security Performance: It can be protective when connect the wire inversely or wrong. All DC12-80V vehicles universal. Product Quantity: 1 Piece Product color: black Product size: 101*66mm