Sunshine Mason Co. solar mason jar lid fairy firefly string lights with 20 LED’s, warm white. Charges automatically when the solar powered mason jar lid is directly under the sunlight. The light sensor design automatically turns on in the darkness and turns off in the daytime. If it’s out of charge, you can use an AAA battery as a backup. Lids fit all regular mouth mason jars such as Sunshine Mason, Ball, and Kerr just to name a few. You can also use the OFF/ON switch for easy control. Our Sunshine Mason Co. solar lid lights can be used for just about anything and anywhere. Ideal for both indoor and outdoor use. Perfect for any occasion as casual as a BBQ to as elegant as a wedding. They are also great as pathway lights in your yard. Give that perfect gift to any family or friend. Jar is not included.