Using this sign is easy. First, find a good spot in your theater or auditorium to mount it. Use the provided mounting hardware and the 25 - foot extension cable to connect it to a power supply. Once it's plugged in, the sign will light up. When you want to indicate the start of the show or the end of intermission, just turn it on. For maintenance, keep the sign clean by gently wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials as they may damage the finish. The LED lights are long - lasting, but if one does burn out after 50,000 hours, it's recommended to have a professional replace it. Also, make sure to store the additional flash module in a dry place when not in use.