Battery operated string lights with 100 LED"s is a brand new product with patented technology that allows the product to last the entire holiday season on one set of batteries. No more plugs to run and batteries to replace. This 100 LED string light is the perfect solution for the holidays or any time of the year. They are bright but safe and cool to touch when lit, and can last 30 days for 6 hours per day with 4 x "AA" batteries (included). Battery is easily replaceable. NO tools required. New and imroved version for 2012! Hold control button for 5 seconds to power off.