Dont limit your decorating to a space that requires an outlet; use the battery operated lights to free yourself from the burden! They are vibrant and more energy-efficient than traditional incandescent lights. Decorate a mantelpiece， centerpiece， or holiday wreath with these lights for a pop of color.Product Features:Color: blue bulbs / blue wire Number of bulbs on string: 15Bulb size: micro wide angle (3mm)Spacing between each bulb: 4Lighted length: 4.8Total length: 5.7510.5 red lead cordAdditional Product Features:LED lights use 90% less energy Durable non-glass bulbsCool to the touch UL certified and approved for indoor use onlyIf one bulb burns out， the rest will stay litNon-replaceable bulbsOn/off switch located on back of battery packCannot connect multiple sets together Material(s): wire/plasticNote: requires 3 AA size batteries - not included