High Quality Material Electric Motor Alarm The outer casing and mounting bracket are made of sturdy metal and ABS resin for drop prevention and durability. Easy to Install The angle of the alarm can be adjusted vertically for flexible installation and precise direction of sound to the desired location for easy installation via a simple two-wire connection. Good Effect Motor Made of high quality pure copper, the speed reaches 10000r/s, produces a big sound in a short time, does not easily create heat and damage, provides stable operation and long service life. > Applicable Specifications All voltage specifications are available for all vehicles with 12V systems. It is suitable for transmitting signals of small elevators, transport vehicles, small ship machinery warehouses, etc. Scope of Application Electric Motor Alarm is suitable for places that require security warnings , such as construction sites, substations and factories, natural disasters and other equipment. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.