Don't limit your decorating to a space that requires an outlet. Use these battery-operated lights to free yourself from the burden! These simple but fun pop-ball Christmas stringed lights would be perfect for your Christmas decor. Decorate a mantelpiece centerpiece or doorway with these fun lights. The light string length is 3'. Recommended for indoor use—place under a covered area if using outdoors. The bulbs are non-replaceable. The on/off switch is on the back of the battery pack. It cannot connect multiple sets.