Using this sign is a breeze. First, find a visible spot inside your business. It could be near the entrance or any area you want to protect. Then, use the included mounting hardware to install it on the wall. Connect the 25 - foot extension cable to the power supply and plug it in. That's it! You can turn it on and off as needed. Remember, this sign is for indoor use only. Don't expose it to rain or extreme weather. To keep it looking good, clean the lens with a soft, dry cloth every few months. If you want to add some extra flair, you can use the optional flash module. The LEDs are long - lasting, but if one does go out after many years, you may need to contact the manufacturer for a replacement.