Look Out 3 & 4 are designed to help create awareness at blind corners!! Unit alerts forklift drivers and pedestrians of dangerous encounters around blind corners. Installation is simple! Plug it into an outlet and you're done! Unit can be hung at any corner, and is designed to mount to any style rack upright. 24 Volt plug-in wall transformer for a 110 Vac receptacle. Optional hard wired universal transformer available. Converts anywhere from 110v to 277v. Amber lights available upon request.