Using these string lights is a breeze. First, make sure the batteries are inserted correctly in the battery box. Then, find a place you want to decorate, like a party backdrop or a wedding arch, and start hanging the lights up. When you're ready to use them, just flip the on/off switch. The lights can last about 48 hours, so you might want to have some extra batteries on hand. Remember, the battery pack isn't waterproof, so don't use them in wet conditions. If the lights stop working, replace the 2 x CR2032 batteries. Store the lights in a dry place when not in use to keep them in good condition.