Dressing up your Christmas tree can infuse a holiday elegance that is charming and unique. When hung on your tree these microlights will take your decor to a new level of brilliance and awe. Hang them from your doors and windows and invigorate your decor in an instant. Product Features: Color: red green yellow and blue bulbs / green wire . Number of each bulbs on string: 15. Bulb size: micro bulb. Spacing between each bulb: 5 . Lighted string length: 7’. Additional Product Features: If one bulb burns out the rest will stay lit. Straight line construction. Requires 2 AA batteries - not included. Non-replaceable bulbs. On/off switch located on the back of battery pack. Cannot connect multiple sets together. Pre-lit with energy-efficient LED lights. UL certified and approved for both indoor or outdoor use