1)Work voltage for the emergency : DC12V or DC 24V
2) This light bar adopt high quality halogen bulb. revolving lightbar is very brightness,warning
light(caution light)is popular !
3) this warning light (warning sign) is very bright and visible both at night and during the day
and is very easy to install and comes with Mounting hardware for roof mount.
Don't need to drill unnecessary holes into your vehicle to install this bar